Destiel

"Dean and I do share a more profound bond... I wasn't going to mention it."

- Castiel.

Destiel is the slash between Dean and Castiel from the Supernatural fandom.

Canon
Dean, having spent four months in Hell (40 years in hell years) after being dragged there by relentless hellhounds, is miraculously rescued by the angel Castiel who later tells Dean "I'm the one who gripped you tight and raised you from perdition." This rescue mission marked Dean's left shoulder with the handprint of the angel. Initially, Dean suspected Sam as his rescuer, but when this proves to be false, the brothers, with Bobby Singer's assistance, seek the help of a psychic, Pamela Barnes. From her the brothers learn of the angel's name, although seeing Castiel's true visage resulted in her eyes being burnt out of her skull. Prior to this unfortunate event, Castiel had tried to communicate with Dean, but his true voice is beyond a human being's capacity to hear and thus, failed to establish any meaningful contact. S4 =

Lazarus Rising
Dean wakes up, after spending four months in hell, and claws his way out of his grave. When he reaches the top, he look around to find the area looking completely destroyed. He makes his way to a gas station, and when he looks in a mirror, finds a hand print on his arm. Technology goes off around him, and he starts to hear a high pitched noise. He covers his ears and ducks as the windows break and the noise gets louder. The noise stops as soon as it starts.

After finding out the being that dragged Dean out of hell name, Castiel, Dean tells Sam that they should try and summon it. Sam thinks it's a bad idea, given what happened to Pamela, and a demon sits down at their table. They realize that the demons don't know what pulled him out either, and that they're just as scared. They leave the diner, and Dean tells Sam that they have to deal with whatever dragged him out, before dealing with the demons.

Dean sleeps in the hotel room, and the same signs from before start to happen and he wakes up. He takes his gun, ready to fight, as the high pitched noise gets louder again. As the glass breaks around him, Bobby enters and takes him away. As they drive, Dean decides that they're going to summon the being, they need to face it head on. Bobby reminds him that they don't know what it is, and Dean says that they'll just prepare for anything.

Bobby and Dean summon the being, and wait. The roof suddenly starts to rattle, and the light pop. The door then breaks open and a man walks through. Dean and Bobby shoot at him, but he doesn't even flinch, much to their shock. Dean then grabs the demon knife, and hides it behind his back, asking the man who he is as they get face to face. He admits to being the one to get Dean out of hell, and Dean sarcastically replies thanks before stabbing him. The man just smiles down at the knife and removes it from his chest. Bobby then tries to knock him out, but he does something that causes Bobby to fall unconscious. He tells Dean that they need to talk, alone.

Dean checks on Bobby, the man informing him that he's alive. Dean asks who he is, and the man answers Castiel. Dean says that he figured that and clarifies that he means what. Castiel responds that he's an angel of the lord, but Dean says that there's no such thing. Castiel says that Dean's problem is that he has no faith, and summons lightning that cause shadows of his wings to appear. Dean gets mad at Castiel for burning out Pamela's eyes, but Castiel tells him that he warned her given that his true face and voice can overwhelm people. But Dean already knew that from the previous times he tried to contact him. Dean says he should lower the volume, and Castiel says it was his own mistake. He thought Dean would be one of the people who can see his true form. Dean asks why he look the way he does now, and he says that it's a vessel, someone who prayed for it. Dean still doesn't believe him, and asks who he really is. Castiel looks at him confused and says that he just did. Dean asks why an angel would pull him out of hell. Castiel tells him that good things do happen, but Dean doesn't have a lot of experience with that. Castiel realizes that Dean thinks he doesn't deserve to be saved, and Dean asks again why he saved him. Castiel says it's because god commanded it, and that they have work for him.

Are you there, God? It's Me, Dean Winchester
Dean is sleeping at Bobby's when the sound of wings flapping wakes him up. He looks to the kitchen and see's Castiel. He gets up and walks over, Castiel telling him that he did an excellent job with the witnesses. Dean asks if he knew about it, and Castiel tells him that he was made aware. Dean sarcastically thanks him for the lack of assistance, and that he thought angels were supposed to be helpful, not dicks. Castiel tells Dean to read the bible, Angels are actually warriors. Dean asks why he didn't fight then. Castiel tells him that he's not there to "perch on your shoulder", and that there were larger concerns. Dean tells him that there were people getting killed, and asks where god is while all of this is going on, if there is one. Castiel assures him that there is, but Dean still isn't convinced. He asks what it takes to get him to help, and Castiel is about to answer, but Dean says if he says "mysterious ways", he'll kick his ass. Dean asks if the witnesses were a sign of the apocalypse, Castiel confirming and those things are why the angels are there. Dean asks if he want to know what kind of things, but Castiel doubts that he needs to know. He tells Dean that the witnesses were one of the 66 seals that are being broken by Lilith. Dean realizes that she chose victims specifically for the hunters, and Castiel says that she has a sick sense of humor. Dean says that they put the spirits to rest, but Castiel says that the seal was still broken. Dean asks why she broke them, and Castiel explains the seals are like locks, and if they break all the seals, Lucifer is let out. Dean is shocked, since he never thought Lucifer was actually real. Castiel says that a few days ago he didn't that that Castiel was real either. He asks why Dean thinks that the angels are on earth for the first time in so long, and Dean gusses that it's to stop Lucifer, Castiel confirms so. Dean sarcastically says that they're doing great so far. Castiel says that they tried to stop the witnesses, but there were other battles. Castiel says that there's a bigger picture, and that Dean should show him some respect, since he can easily throw Dean into the pit, as easily as he threw him out, and flies off.

In the Beginning
Castiel appears in Dean's motel room, startling him. He asks what Dean was dreaming about, but Dean doesn't answer. He angrily ask if Castiel gets off on watching other people sleep, and what he wants. He tells Dean that he has to stop it, much to Dean's confusion, and sends Dean back in time.

As Dean follows his Dad, Castiel appears in front of him. He angrily asks Castiel what's going on, and Castiel asks Dean what he thinks that means. Dean asks if it's all real, and Castiel replies that it is very real. Dean asks how he got here, and Castiel explains that angels can occasionally bend time. He tells Castiel to send him back or tell him why he's here. Castiel just says that he has to stop it, but Dean doesn't know what he means. Castiel disappears before he can ask more.

As Dean is driving, Castiel suddenly appears startling him. He asks why Castiel didn't bring Sam back with him. Castiel tells him that he had to do it alone. Dean says that Sam is looking for him, but Castiel says that Sam isn't looking for him. Dean asks if he changes the past, everything else changes and they grow up normal. Castiel asks if Dean knows that if they never become hunters, all the people they saved would die. Dean says he knows, and he cares, but it's his parents and he can't let them die. Castiel then disappears.

Dean watches Mary make the deal, unable to stop what happened, when Castiel appears behind him. He places his hand on Dean's shoulder, and gives Dean a moment to process what happened, before taking them both back. Dean says that he couldn't stop any of it. Castiel says that he couldn't have, confusing Dean. Castiel says that it was destiny, and the outcome is still the same, and Dean asks why he was sent back then. Castiel says it was so that Dean would know everything they do, and Dean asks what he means. Castiel glances to the other bed, and Dean asks where Sam is. Castiel says that they know about the demon blood, but they don't know why. Dean asks where Sam is again, and Castiel gives him the adress. Dean grabs his stuff, as Castiel gives a warning about Sam, and that if he doesn't stop it, the angels will.

It's the Great Pumpkin, Sam Winchester
Sam enters the motel room, when he sees a man and pulls out his gun. Dean stops him, explaining that it's Castiel and Dean asks Castiel who his friend is. Castiel instead asks if they've stopped the raising of Samhain, Dean asking why. Castiel then asks if he's located the witch, Dean confirms so. Castiel asks if she's dead, and Dean saying that they know who it is. Castiel tells them that the witch knows who they are, and shows them the hex bag that was in the wall of their room. If they hadn't found it, they would be dead. Castiel asks if they know where the witch is now. Dean says that they're working on it. Castiel says that's unfortunate, and Dean asks why they care. Castiel tells him that Samhain is one of the seals, Dean realizing that it's about Lucifer. Castiel says that it has to be prevented, and Dean says that they should tell them where she is so that they can kill her. Castiel tells him that they can't find her. Sam says that since they know who she is they can work together to find her but Uriel interrupts them. Dean asks who he is again, and Castiel says that he's a specialist. Dean asks what kind, and what they're going to do. Castiel tells them that they need to leave town. Dean asks why, and Castiel tells him that they're about to destroy it.

Dean asks if that's really their plan. Castiel tells him that they're out of time and that the witch has to die, that there's a bigger picture. Dean is reminded that they're bigger picture people, Castiel tells him that if Lucifer rises so does hell, and asks if that's something Dean is willing to risk. Sam says that they'll stop the witch before she summons Samhain, that way no one has to die. Castiel says that they have no choice, but Dean says that they do. He asks if they've never questioned a bad order, or if they just follow blind. Castiel tells him that they don't understand, and that it is just. Sam asks how he can say that and Castiel says that if comes from heaven. Dean sarcastically says that it must be nice to be so sure of themselves, and Castiel asks if Dean ever disobeyed his father. Dean doesn't answer and just says that they're plans are going to have to change, and that if they kill the town they kill him. He looks to Castiel and says that going to so much trouble to get him out of hell must mean that he's worth something. He walks over to Castiel and says that they can do it. Uriel tells him that they need to stop listening to them, but Castiel interrupts him. He tells Dean that they have to work quickly, Dean nods, agreeing.

Dean is sitting on a park bench when Castiel appears. He guesses that Castiel is here to say "I told you so," but he's not. Dean asks why he's here then, and Castiel tells him that his orders weren't to stop Samhain, but to do whatever Dean told them to do. Dean is confused, and Castiel explains that it was a test to see what Dean would do. Dean says that he doesn't care that he failed, because the town is still standing because of him and Sam. Castiel tells him that he misunderstood him, and had been praying that Dean would save the town. Dean is surprised and Castiel tells him that everyone was his fathers creations and considers them art. But they're still one step closer to having Lucifer free, and asks if he can tell him something as long as he promises not to tell anyone else. Dean says yes, and Castiel expresses that he has questions and doubts and whether or not Dean actually passed the test. But he also tells him that Dean will have more decisions to make, and doesn't envy the weight on his shoulders. They stare at each other for a moment, before Castiel disappears.

I Know What You Did Last Summer
Dean, Sam and Ruby gear up to fight what they think is a demon, but instead it's Castiel and Uriel. Dean asks if they're there to help and Castiel tells them that they're there for Anna. Sam asks if they're there to help her, but Castiel says that she has to die.

Death Takes a Holiday
Alastair is about to kill Dean when he is suddenly struck by lightning. Dean is surprised, muttering "What the hell?" when he hears a voice behind him say "Guess again". He turns to see Castiel standing there. Castiel tells him that Dean and Sam just stopped one of the seals from being broken, and they captured Alastair. Dean asks if Castiel was there, and he says he was for enough of it. Dean sarcastically thanks for his help with the rock salt, but Castiel explains that there was angel proof sigils on the building. Castiel asks why he thinks that he recruited Sam and Dean, leaving Dean confused. He asks why Castiel didn't just ask them for help, and Castiel says that they always do the opposite of what he says. Dean asks if the people in the town are going to start dying again, and Castiel says yes. Dean asks if they can make exceptions, but Castiel says he can't. Dean reminds him that he did it for him, but Castiel just says that Dean is different, and disappears.

On The Head Of A Pin
Dean and Sam enter their motel room where they find Uriel and Castiel waiting for them. Uriel tells Dean that he's needed, and he becomes angry, since they just got back from Pamela's funeral. Dean continues to yell at Uriel, and Castiel tells him that they know it's difficult for them to understand, but Uriel interrupts him. Uriel tells them that something is killing angels. Castiel explaining that they just need them to help find them. Dean asks if they actually need his and Sam's help finding a demon, and Castiel says that's not quite what they need, since they have Alastair. Dean says that Alastair should be able to tell them, but Castiel says that he won't tell them. Dean says that that level of torture is out of their league, and Uriel says that's why they came to Dean. Castiel says that Dean is their best hope, but Dean says no and begs Cas not to ask him to it. Uriel then takes them away.

In an abandoned warehouse, Azazel is in a devil's trap, Dean and Castiel looking into the room. Castiel tells Dean that since it's old enochian, Alastair is bound completely. Dean says fascinating and asks where the exit is, walking away. Cas asks where he's going, and Dean says he'll hitch a ride back to his motel, but Uriel stops him. Dean says that they may be all powerful, but they can't make him do this. Castiel knows that this is too much to ask, but they have to ask it. Dean tells Uriel that he wants to talk to Cas, alone. Uriel agrees then leaves. Dean asks what's going on, since Cas is taking orders from Uriel. Cas explains that his superiors were questioning his loyalty, since he was getting to close to Dean. Dean tells Cas to tell whoever's in charge, that they don't want him torturing again. Cas says that he doesn't want it, but was told that they need it. Dean tells him that if he goes through the door, he won't like what comes out. Cas tells him that if he could he would give anything not to have Dean do it.

In Dean's hospital room, Cas sits at his side and asks if he's alright. Dean says it's not thanks to him. Cas tells him to be more careful, and Dean tells him to learn to manage a devil's trap. Cas tells him that's not what he means, and that Uriel is dead. Dean asks if it was the demons, and Cas tells him it was that he was working against heaven. Dean asks him if it was true that he was the one to break the first seal, and Cas confirms so. Cas tells him that when they found out what Lilith planned for him, they went to hell before it could happen, but they were too late. Dean asks why they didn't just leave him there, but Cas says that it's not his fault, it's fate's. The one who starts it, is also the only one who can finish it. Dean asks what that means, but Cas doesn't know, just that fate rests with him. Dean says that he can't do it, he's not strong enough. Cas looks to him, as he starts to cry. He tells him to find someone else, since it's not him.

The Monster at the End of This Book
Dean pushes Chuck up against a wall and demands answers, when Castiel appears and tell him to let Chuck go. Dean turns around, and lets Chuck go. Cas tells him that Chuck needs to be protected, and Dean asks why. Cas tells him that Chuck is a prophet of the lord. Dean doesn't believe that Chuck is a prophet, asking Cas if this is really the guy who decides their fate. Cas tells him that Chuck doesn't decide it, he just writes it, and one day the Supernatural books will be known as the Winchester gospel. Chuck excuses himself, and leaves the room. Dean asks how they get around Sam and Lilith, but Cas says that they can't, since it's the word of a prophet.

Outside the motel room, Dean, in a very big act of desperation starts pray. Cas appears behind him and tells him that his praying is a sign of faith, and a good thing. Dean asks if that means he'll help, but Cas asks what he wants him to do. Dean tells him to drag Sam out before Lilith shows up, but Cas can't interfere with the prophecy. Dean reminds him that the angels have pulled him so many different ways, and he's never asked for anything except right now. Cas says it's not within his power, and Dean asks if that's because of the divine prophecy which Cas confirms. Dean asks if they're really just supposed to let it happen, and Cas says he's sorry. Dean tells Cas if he doesn't help, the next time they need him they shouldn't bother. Cas whispers Dean's name. Cas comes to a realization and tells Dean that he can't interfere because the prophet is protected by an archangel, and if something threatened the prophet one would appear. Dean asks what would happen if a prophet were in the same room as a demon, and Cas tells him that the wrath of heaven would be upon said demon. Which is why he can't help. The two reach a non-verbal understanding, and Dean thanks Cas, Cas wishing him luck.

The Rapture
As Dean dreams, Cas suddenly appears in them, saying they need to talk more private since it's unsafe. Dean questions what's not private about his head, but Cas says that somebody could be listening. Dean asks what's wrong, and Cas tells him to meet him at the address marked down on the piece of paper. Dean then wake up.

Once Cas returns to his vessel, Dean asks what he was gonna tell him, but Cas says that he learned his lesson while he was gone. He serves heaven not man, and certainly not Dean. Dean looks at him confused as he walks away.

When the Levee Breaks
Dean is yelling to Castiel outside of Bobby's when he appears. Dean says that it's about time, and that he's been screaming for 2 and a half hours. Cas asks what he wants. Dean tells him to starts with Illinois, but Cas just asks what he means. Dean tells him to cut the crap, since he was gonna tell him something, but Cas says it wasn't important. Dean reminds him that he was dragged back to heaven, so that's clearly not true, but Cas tells him that he can't and that he's sorry. Dean watches Cas walk away slightly. Cas knows that the reason Dean really called was about Sam. Dean asks if Sam can kill Lilith and stop the apocalypse, Cas telling him that it's a possibility, but he'd have to consume enough demon blood that would change him into something that Dean would want to kill. Cas tells him that the angels believe that Dean is going to be the one to stop Lilith, not Sam, but he would have to accept the roll he plays. Dean asks that if he does it Sam won't have to, and Cas says that he can see it that way if it brings him comfort. Dean says that Cas is a dick these days, but after a moment of consideration, he says he's in. Cas asks if he's giving his full service to god and the angels, and Dean says yes. Cas tells him that he has to say it. He then repeats the words Cas said. Cas recites more words of the promise and Dean agrees. He asks what they do now, and Cas tells him to wait, they'll call him when it's time.

Lucifer Rising
Dean knocks over an angel statue, when Cas appears asking why Dean wanted to see him. Dean tells him that he need Cas to take him to Sam, and Cas asks why. Dean says that he needs to tell him something, Cas asking what, but Dean says that it doesn't matter. Cas says he doesn't believe that's wise, given the last time he the two met. Dean tells Cas he didn't ask for his opinion. Dean says that he's doing what the angels want, he just needs to tie things up with Sam first. Cas says no, and Dean asks if he's trapped there. Cas says that he can go wherever he wants except see Sam. Dean says that he wants to take a walk, and Cas says he'll go with him. Dean says that he wants to go alone, but Cas says no. Dean says he's leaving and walks towards the door, and Cas asks through what door. Dean turns back to the door to find it gone. He turns back to Cas to find him gone as well.

As Dean attempts to call Sam, Cas appears and tells him that he can't reach him. Cas asks what he's going to do to Sam, and Cas says that they're going to do nothing. Dean asks Cas why he's there, and Cas tells him that since they've been through a lot, he's sorry that this is how things end. Dean then punches Cas, and says that Armageddon needs a bigger word than sorry. Cas says that it's long foretold, but Dean doesn't want to hear any of the destiny crap. It's all lies that they're using to keep the two of them in line. Dean tells him that the real stuff is all the people and asks if he can really just let them all burn. Cas asks what's so worth saving, since all he sees is pain and suffering. In paradise they can be at peace, even with Sam. Dean says he rather have all the pain and everything than paradise. Cas turns away as Dean tells him to throw away the angel stuff and realize the right and wrong. He grabs Cas' shoulder and forces him to turn around and look at him. Dean realizes that Cas was gonna tell him about Lilith before he was pulled back to heaven, and asks him to get him to Sam before it's too late. Cas says if he does that, they'll all be hunted and killed by the angels. Dean says that this is something worth dying for, but Cas is still unsure. Dean calls him spineless and soulless, and he wouldn't care about dying since he's pretty much dead already. He tells him they're done, and Cas leaves.

As Dean is about to eat a burger, Cas appears from behind and pushes him up against a wall and covers his mouth. He pulls out a knife, and removes his hand from Dean's mouth. Cas and Dean don't talk as Cas let's him know he's not gonna hurt him. Dean watches as Cas uses the knife to cut into his own arm and starts to paint the angel banishment sigil. Zachariah appears, and Cas banishes him before he can stop him. Cas tells Dean that Zachariah won't be gone long, so they have to find Sam quick. Dean asks if he knows, but Cas just knows someone who does, and they have to stop him from killing Lilith. Dean says that Lilith is gonna break the final seal, but Cas tells him that killing Lilith is the final seal.

Dean and Cas suddenly appear in Chuck's house surprising him, since he didn't predict it. Dean reads the pages, asking if St. Mary's is a convent. Chuck confirms so, but tells Dean that they're not supposed to be there. Cas tells him that they're making it up as they go. The computer starts to flicker as an archanegel appears. Cas tells Dean that he'll hold him off, and for Dean to stop Sam, before he transports him to St. Mary's.


 * -|S5 =

Sympathy for the Devil
As Zachariah tortures Sam and Dean, Cas suddenly appears and kills one of the angels. He fights off the other angel and scares Zachariah into fixing Sam and Dean. Zachariah leaves, and Sam and Dean get up from the ground. Cas tells them that they need to be more careful, Dean agrees, given that the angels are bigger dicks than he thought. Cas says he doesn't mean the angels, but Lucifer. He looks between Sam and Dean and touches their chests, carving enochian sigils to hide them from the angels. Sam asks Cas if he was really dead, and Cas confirms so. Dean asks how he got back but doesn't give an answer. He just looks to Dean before disappearing.

Good God, Y'all
Dean shows Sam the X-Ray of his lungs that Cas gave them, just as Sam gets a call from Cas. He tells them where they are, and Cas comes to the hospital. Dean asks since when he's needed a cell phone. Cas reminds him that they're hidden from all angels, including him, when Bobby interrupts them. After telling Bobby he can't heal him, Cas turns to Dean and tells him that the needs to talk quickly. He tells Dean that his plan to kill Lucifer can't be done, and Dean sarcastically thanks him for support. Sam watches Dean and Cas talk. Cas says that there is still someone strong enough to take on Lucifer, and Sam asks who. Cas tells him that he's going to find god, surprising both Sam and Dean. Dean tells him that if God is real, then he's either dead or doesn't care about them. Cas tells him to stop, and that with god they can defeat Lucifer. Dean calls it a pipe dream, but Cas tells him that he rebelled against heaven for him, So Dean can keep his opinions to himself. Bobby interrupts saying that Cas didn't just come to be angry at them. Cas reveals that he came for an amulet that can find god. He looks to Dean then, down at his amulet, indicating that it's the amulet. Cas asks to borrow it, but Dean says no. Cas asks again, and Dean takes a moment before taking it off. As he's about to hand it over he tells Cas not to lose it, Cas takes it and tells him he'll be in touch before disappearing.

Free to Be You and Me
Dean is in his motel room, when Cas suddenly appears behind him. He looks up and sees Cas in the mirror, startling him. He tells Cas not to do that, but Cas just responds with a hello. Dean turns to face him, and is very close to him. Dean reminds him that they've talked about personal space, and Cas apologizes as he steps back. Dean asks how Cas knew where he was, and Cas tells him that Bobby told him. He asks where Sam is, and Dean says that they're separated right now. He asks if Cas found god, and if he can have his necklace back. Cas says no, which is why he's here, since he needs Dean's help. Dean says he's not interested in hunting god, but Cas says that he's trying to find the archangel that killed him, Raphael. He has information, and Dean asks if he thinks that Raphael will just hand over god's address. Cas thinks it will work, since they'll capture and interogate him. Dean asks if he's serious, and Cas says that he is. Dean asks for one good reason to it, and Cas says that being Michael's vessel, no angel will harm him. Dean is offended, and Cas tells him that Dean is the only one who will help him. Dean says fine, and asks where Raphael is. Cas says Maine, and is about to transport them, but Dean stops him and decides that they're driving.

The two arrive in Maine, Dean asking why they're at a police station. Cas tells him that a Sheriff was the one to see Raphael. Dean asks what the plan is, and Cas tells him that they're going to tell him the truth. Dean says that's a bad idea, pulls out a fake FBI badge, and places it in Cas' coat. Cas asks why, and Dean tells him that they're humans and when they want something they lie. They go inside the police station and meet with the sheriff as "FBI". They're able to get the location and head down to St. Pete's hospital where they find Raphael's vessel, completely broken. Dean asks if that's what will happen after he is possessed by Michael, but Cas tells him it'll be much worse.

Dean is in an abandoned house as Cas returns. He asks where he was, and Cas tells him he was in Jerusalem for holy oil that can be used to trap Raphael. Dean asks if they have a chance of surviving a confrontation with Raphael, and Cas tells him that Dean does, but not him. Dean asks what Cas plans to do with his last night on earth, but Cas doesn't have any. Dean suggests booze or women and asks if Cas has been with anyone. Cas awkwardly tells him that he's never had the occasion. Dean then decides that Cas isn't going to "Die a virgin on my watch." and takes him out.

Dean takes an extremely nervous Cas to a brothel. He tells him to relax, but Cas just calls the place a den of inequity, and that they shouldn't be there. Dean says that rebelling against heaven has inequity as one of the perks. A girl walks over and Dean tells him it's showtime. She starts to pull Cas away, but Dean stops them for a second. He gives Cas some cash and advice, which Cas takes as he follows her. Dean starts having drinks with another girl, when he hears a scream. He follows it and finds Chastity yelling at Cas. As she stomps away he asks what Cas did. Cas says that he doesn't know, all he did was tell her that her dad didn't run off because of her. Dean laughs and tells him that the whole industry runs on absent fathers, just as two bouncers show up. Dean tells him it's time to go and the two leave quickly. Once outside, Dean bends over laughing, and Cas asks what's so funny. They walks to the car, and Dean tells Cas that "it's been a long time since he laughed so hard".

The next day, Cas and Dean go back to the hospital to perform the ritual. Dean asks how it works, and Cas tells him that there's a line between an and angel and their vessel. Dean watches as Cas calls the line, and when he's finished Dean asks how long it will take for a response. Cas just tells him to be ready and lights the holy fire around the vessel. When they spend the whole day waiting and it doesn't work, they go back to the house where Raphael appears. Raphael tells Cas that it's a mercy that he doesn't kill him, but Dean calls him out and says that he's probably just afraid that Cas will come back to life again and kill Raphael. Raphael tells Dean that he know who, and now, he is. Cas says that he won't kill Dean, which Raphael says is true, but he will take him to Michael. Dean reveals that they knew he was coming and light the holy fire ring that he steps into. Cas asks him where god is, but Raphael just says that he's dead.

Cas accuses Raphael of lying, but Raphael believes it's true, given the state of the world. Dean argues with Raphael over the state of the world when he causes the windows to blow out. Cas asks who brought him back if god is dead, and Raphael suggests Lucifer. Cas tells Dean they're leaving, but Raphael quickly says that he will find him. Cas tells him that may happen "but today, you're my little bitch." Dean then follows him out and agrees with Cas.

As the two drive away, Dean asks Cas if he's okay but he doesn't answer. He tells Cas that he still thinks his crusade his nuts but he does know about missing dads. Cas asks what he means, and Dean explains that there were times where he was looking for John even when it seemed he was dead, but he still believed he was alive. He asks Cas what he believes, and Cas says he still believes he's out there. Dean tells him to go find God, and Cas asks what he'll do. Dean doesn't know, just that he's good right now. Cas asks if that's even without Sam, and Dean says especially that. He's spent so much time worrying about him that he had more fun with Cas in that day than he had with Sam in years. He turns to see that Cas is gone.

The End
Dean calls Cas once he gets to another motel room, and asks if Cas is talking about the Colt, which Dean doesn't get since, the demons really shouldn't be keeping a gun that kills demons around. Cas was unable to hear him since a truck drove by, causing Dean to laugh. Angel on a cell phone. Cas says it isn't funny, since the voice says that he's almost out of minutes. Dean says okay, but thinks the demons already melted down the gun. Cas apparently heard different, and it's pretty much their only way of killing Lucifer. Dean asks where they start, and Cas asks where he is. Dean tells him, and he says he'll be right there, but Dean stops him, since he needs to sleep for at least 4 hours. Cas understands, and Dean tells him to pop in the next morning. Cas agrees as Dean hangs, up and waits.

Just as Zachariah is about to punish Dean, Cas whisks him away. Dean tells him that it was perfect timing, and Cas says it's because they had an appointment. Dean places his hand on Cas' shoulder and tells him to never change. Cas asks how Zachariah found him, and just tells him they need to stay away from religious zhelots. He pulls out his phone, and Cas asks what he's doing. Dean tells him something he should have done first, and calls Sam.

I Believe that Children Are Our Future
Dean and Sam arrive back at their hotel room where they find Cas. Cas tells them that they're lucky they found Jesse. Dean asks what they do with him, and Cas tells them to kill him, shocking Dean and Sam. Cas reveals that Jesse is actually the anti-christ. Dean asks what Jesse is doing in Nebraska, and Cas tells him that the demons lost him, since his power hides him from Demons and Angels. Dean assumes that solves the problem, but Cas tells him that Lucifer causes the kids powers to grow stronger and will draw the demons to him. Sam tells Cas that they're not going to kill a child. Dean steps in and tells Cas that they won't kill him, but they can't leave him either so they'll take him to Bobby's and figure it out from there. Cas tells him that this is what Jesse is like when he's happy, it'll be so much worse if it's angry, and starts pointing out the holes in their plan and leaves.

Sam and Dean get to Jesse's. Dean asks Jesse if there was a man in a trench coat there, and Jesse points to Cas he made into a doll.

Sam and Dean find Jesse's room empty, and Cas comes up and tells him that he's gone and turned everyone back to normal. Dean asks how they'll find him, but Cas says that they can't, unless he wants to be.

The Song Remains the Same
Castiel continues searching for God and helping Dean. When Castiel finds out Anna is back, and that she is after Sam and Dean's parents, he plans on going into the past to stop her. Though initially reluctant to take the Winchester brothers with him, he ultimately agrees. He is severely weakened by the trip, passing out and gagging on blood when they arrive in the 70s, and then falling into a brief coma when he returns to the present.

My Bloody Valentine
When a case Dean and Sam are working on leads them to hearts with Enochian sigils carved on them, Dean calls Castiel in for assistance. While they initially believe that a rogue cupid is killing people, the true culprit, Famine, affects Castiel through his vessel, Jimmy Novak, who apparently has a craving for hamburgers. Castiel stuffs himself throughout the episode, much to Dean's disgust, and asks Dean why he hasn't been put under Famine's curse. When Dean explains that he doesn't deny himself anything, Castiel asks, "So you're just well-adjusted?" The original plan to kill Famine was to send Castiel in; however, this ends badly when Castiel is distracted by a slab of raw ground beef. Later, after Famine is incapacitated and Sam is locked up to go through detox, Castiel attempts to comfort Dean, though it doesn't appear to work. When Sam and Dean go to Heaven in Dark Side of the Moon, Castiel asks them to look for Joshua, as he may know where God is. They find Joshua and find out that God knows about Earth's problems and simply doesn't care. This hurts Castiel, who renounces his faith in God and disappears.

Following that, in 99 Problems, Castiel arrives on the scene drunk, short tempered, and bitter. He and Dean later have a heart-to-heart about poor fathers.

In Point of No Return, Dean attempts to say yes to Michael, which horrifies and enrages Castiel who helps Sam take Dean to Bobby's house. They try to change his attitude before Cass goes to retrieve the resurrected Adam Milligan (Sam and Dean's half-brother) who is suspected as a replacement vessel for Michael. With this added problem, they lock Dean in the panic room of Bobby's basement to stop him from leaving. The feelings of betrayal come to a head when Dean escapes Bobby's home by banishing Castiel and attempts to contact the angels. Castiel appears and beats Dean within an inch of his life, venting his frustration. He later goes on a suicide mission, stating that he would rather die than watch Dean crumble and fail.

Castiel later returns in Two Minutes to Midnight and apologizes to Dean for not having more faith in him. Dean forgives him, and they reconcile. However, Castiel admits that, technically, he is human, having depleted his "batteries" during his suicide mission. Despite this, Castiel still comes to Dean and Sam's rescue and cuts off Pestilence's finger.

In Swan Song, Castiel is shockingly human, displaying more emotion than ever. He appears during the fight between Michael and Lucifer, distracting them by throwing a molotov cocktail of holy fire at Michael. This allows Dean to try and get through to Sam, though it ends with an offended Lucifer causing Castiel to explode.

The angel is brought back after the battle, "new and improved", and heals Dean and brings back Bobby. Dean suggests that God wants Castiel to be the new leader of Heaven, though they part ways on a tense note.

Castiel comes when Dean calls him in The Third Man. He mentions in this episode that he has more profound bond with Dean than Sam. Castiel helps Dean figure out it is the Staff of Moses doing the killing and the trail leads to a rogue angel and friend Balthazar. Castiel also mentions that he needs the stolen weapons of Heaven back due to a civil war in heaven against the archangel Raphael.
 * -|S6 =

Dean calls Castiel again when he's worried about Sam, but Castiel refused to answer unless it was connected to the fight he and Dean had which angered Dean. When Castiel does show up, he dismisses Dean's theory that Lucifer still inside Sam. Castiel promises Dean to make some inquiries after telling him that he, Castiel, doesn't answer Dean's prayers when they're connected to Sam because he doesn't know how to help.

Dean later calls Castiel to check on what's wrong with Sam Family Matters. Castiel reaches into Sam, and discovers that he doesn't have a soul, and explains that whoever brought Sam back left Sam's soul behind in the cage with Michael and Lucifer. When Dean questions whether soulless Sam is even still "Sam", Castiel admits that that's a good question.

In Caged Heat, Castiel exhibits more human urges, inadvertently watching porn, and later passionately kissing Meg, both to Dean's discomfort. Castiel warns Dean that bringing Sam's soul back could permanently damage the younger Winchester psychologically, but Dean remains firm on retrieving the soul. Castiel is banished with a sigil when they lay siege to Crowley's warehouse, but later returns with Crowley's bones, which he promptly incinerates when Crowley admits he can't retrieve Sam's soul from the cage. Later, when Castiel admits to Dean that he is on the losing side of the civil war in Heaven, Dean assures his friend that if he needs help, all he has to do is ask. When Sam gets his soul back, Dean calls Castiel to check on him. When Dean questions Castiel on whether or not Sam will wake up, Castiel is curt with him, and berates Dean for not listening to him. When Dean reacts defensively, Castiel angrily tells him that Sam's soul felt "as if it was skinned alive", and tells Dean that if he wanted to kill his brother, he should have done it outright, making his stance on the matter clear.

When Castiel and Balthazar go back in time to stop the Titanic from sinking, Atropos—one of the three Fates—forces Castiel to capitulate and fix the timeline by threatening the Winchesters. He doesn't tell Dean or Sam the real reason for going back in time; while he really sent Balthazar so that they would have more souls for the war, he allows them to believe that Balthazar simply didn't like the movie, or Celine Dion.

Later, the Winchesters find a way to kill Eve, using the ashes of a phoenix. However, their call for Cass is answered by his lieutenant, Rachel, who promptly loses her temper with them after they insist on speaking with Castiel. Despite her passionate words on his behalf, Castiel appears and dismisses her, much to her chagrin. He agrees to help them go back to the Wild West, and is the first to question Dean's choice of dress, asking if wearing a "blanket" was customary.

When the Winchester's search for Eve rapidly proves fruitless, Bobby suggests that Dean call Castiel. However, Castiel admits that he's had no luck either. When the Winchesters decide to track down a monster that is loyal to the cause, Castiel finds Lenore, a vampire that has had run-ins with the Winchesters before. After she tells them what she knows, she begs them to kill her, because the call of the Mother is forcing monsters to give into their baser natures. While the Winchesters are both reluctant, Castiel obliges. When they go to the town Lenore told them the Mother was in, Castiel is made powerless by her, much to Dean's irritation.

In The Man Who Would Be King, Castiel's betrayal is slowly becoming known though Dean does not want to believe it, and remains desperately loyal to his friend. In the prequel part of the episode, Castiel attempts to explain freedom to the angels (in hindsight, he describes the experience as being comparable to teaching poetry to fish, and cynically states that he should have told them that "Freedom is a length of rope. God wants you to hang yourself with it"). Raphael is less than enthused, and demands that Castiel show his support, though Castiel refuses when Raphael announces his intent to restart the Apocalypse. Castiel almost goes to Dean for help, but ultimately decides not to drag his friend into the mess, rationalizing that Dean has been through too much already. Crowley appears and, playing on the angel's new sense of pride, manages to strike a deal with Castiel: his help, and 50,000 souls upfront, in exchange for half the souls of Purgatory. Castiel agrees out of desperation, and while Crowley insists that keeping the Winchesters alive is dangerous, Castiel refuses to kill them, still considering himself their guardian angel. However, during this time, Castiel takes to spying on the Winchesters and Bobby, and later betrays this fact by referencing part of a conversation he'd overheard. This leads the others to realize that he is not to be trusted, and they capture him in a circle of holy fire. Dean takes this betrayal the hardest. Later, Castiel goes to Bobby's in an attempt to explain his actions, but refuses to back down, even when Dean threatens to fight back. Despite this, Castiel still helps Dean in Let It Bleed. When Dean is about to be killed by a demon he's interrogating, Castiel steps in and saves him. Dean is still hurt by Castiel's betrayal, and reacts with hostility. Castiel tells Dean that he too considers them to be family, and tells Dean that after all he, Castiel, has done for the Winchesters, Dean should trust Him. Even when Dean says he can't, Castiel tells him that he will find Lisa and Ben, who have been kidnapped by Crowley. They part on a hostile note, with Dean telling Castiel that he doesn't want his help. Later, Castiel comes by Lisa's hospital room, and despite Dean's exhausted hostility, heals Lisa without prompting. Dean, though grateful, states that it doesn't change the situation, a statement that Castiel regretfully agrees with. Dean asks for one more favor, which Castiel grants: the angel erases Ben and Lisa's memories of Dean. Castiel later appears before Dean in The Man Who Knew Too Much. Dean is angry at Castiel when he appears after killing Dr. Visyak. Castiel tells Dean he no longer cares what he thinks, and is tired of getting his approval, but promises that if Dean doesn't fight anymore, Sam will be alright in the end. In an apparent attempt to distract Dean, Castiel breaks down the mental wall that stopped Sam from remembering his year without a soul or his soul's time in Hell.

After Castiel absorbs the souls of Purgatory, he tells Dean that, despite his doubts, Castiel was right in what he did. Dean tries to talk Castiel into releasing them. Dean finishes his emotional plea by saying how Castiel was family once and if that still has any value to Cass, he will listen to Dean. Castiel mentions that Dean is afraid of his power (implying that he isn't going to listen to Dean's plea), which is why Dean is being nice to Castiel. Castiel informs Dean that he is no longer his family, that they never were family, and that he has no family. He proclaims himself to be the new, better God, and demands that they bow and proclaim loyalty and love, or be destroyed.

After Castiel's betrayal, both sides are hurt by each other. Castiel spares Dean, and leaves. Dean, realizing he can't fight against Castiel, gives up until an idea to bind Death comes up. Dean and the others summon and bind Death to kill Castiel. When Castiel appears, Dean tells Death to kill Cass, but Death has been freed, and does not. Dean has given up on Castiel, until Cass comes asking for help. Dean rushes to Castiel's aid. While working, Castiel apologizes to Dean for what he's done, and promises to make it up to Dean. As the door opens to Purgatory, Castiel collapses, and Dean rushes to help him stand. Castiel releases all the souls back into Purgatory.
 * -|S7 =

However, the Leviathans stayed in Castiel and soon take over. Castiel's vessel isn't able to contain them for very long and begins leaking black ooze. The Leviathans head towards the municipal water supply, and disappear in the water. The only thing left behind is Castiel's trenchcoat, which Dean keeps, hoping that his friend will come back one day. Dean is upset at his friend's loss. In Shut Up, Dr. Phil Dean has nightmares of Castiel's death, showing that Dean still feels the loss of his good friend.

Much to his surprise, Dean finds Castiel again and is shocked to see him alive. In The Born-Again Identity, Dean finds Castiel, now going by Emmanuel, married and has no memories of his past life. Putting his anger, Dean asks Cass to heal Sam. On the way to the hospital, Dean and Castiel talk, and Dean talks about how his "friend" betrayed him. Castiel doesn't catch on to this, and tells Dean that he's not a machine. When Meg tags along, Dean avoids telling Castiel the truth, fearing that Cass won't help Sam. At the hospital, many demons block their path. Castiel overhears Dean and Meg talking, and walks over. Meg reveals that Castiel is an angel, and Dean backs this up. As Castiel smites the demons, he begins to remember. After all the demons are gone, Castiel attempts to leave saying he shouldn't be here after what he did. Desperate to help Sam, Dean tries to defend Castiel's previous actions, but Castiel shoots it down. Castiel wonders out loud why he lived. Dean resorts to Castiel, to fix things, and gives back Castiel his trenchcoat. Castiel saves Sam from a demon, but tells Dean he is unable to fix Sam's mind. In order to redeem himself, Castiel takes on Sam's memories of hell. Unable to help Castiel, Dean leaves him in the mental ward of the hospital. Dean is still concerned for Castiel and calls to check in on Castiel with Meg.

In Reading Is Fundamental, Dean gets word that Castiel is awake and, heads over. When over, Castiel warmly greets the both of them, with a "Hello Dean. Sam." Meg and the boys start arguing, and he disappears with, "Don't like conflict". Dean finds Castiel calmly seated, and together they play 'Sorry'. As they play, Dean gets increasingly frustrated with Cas and pushes the board away while shouting "You're not sorry, you're playing Sorry!". Dean still can't forgive Castiel for what he did.

In Survival of the Fittest, Dean is showing signs of forgiving Castiel and taking in Castiel's new mental state. When they notice that Dick has multiplied, Meg points out that they need Castiel. Dean gets angry when Castiel says he doesn't want to get involved and he angirly points out that they are cleaning up Castiel's mess. Castiel changes his mind when he sees Dean say goodbye to Bobby. After, Dean asks Castiel to take him to where they are hiding the Impala. Castiel tells Dean hes not good luck and probably get everyone killed. Dean points out that he rather have Cass on his side than not at all. Castiel notices that it sounds like Dean is forgiving him and agrees to help, possibly out of loyalty to Dean after Dean says he's probably going to die in the attack.

Dean and Castiel begin looking for the real Dick Roman. Together they are able to find the real one and stab him with the bone fragment. The first is a fake, so while Dick is occupied, Castiel grabs him from behind so Dean can stab him with the real one. This causes Dick to explode, sending Dean and Castiel to Purgatory. Castiel wakes Dean up and tells Dean where they are. As the monsters come close, Dean notices that he is alone due to Castiel teleporting away.

While in Purgatory after Castiel's disappearance, Dean was relentless in finding his whereabouts. In What's Up, Tiger Mommy? Dean finds Castiel near a river and is happy to see his old friend who is now sane again. Castiel reveals that he did abandon Dean, but to protect him from the Leviathans. Dean convinces Castiel to join him and Benny in their quest to get out, and he refuses Castiel's repeated pleas throughout the journey to leave him be as he is drawing monsters to them due to being a Seraph. When Benny saves Castiel from a Leviathan, this seems to increase Dean's trust in the vampire, that he would help Castiel out despite all of his arguments against Castiel being with them. Castiel and Dean later fight two Leviathans together with Castiel helping Dean to kill one. Dean gets out of Purgatory through the portal they find, but Castiel stays behind, believing that staying there will be pennance for his sins. Dean remembers it as losing his grip on the angel and carries a lot of guilt for this. He later tells Sam that Castiel didn't make it, but only says that it got hairy near the end and that Castiel "just let go," refusing to elaborate.
 * -|S8 =

After Castiel's return in A Little Slice of Kevin, Dean is to see him, but is suspicious of his return, knowing that Castiel was in no shape to escape on his own. He later tries to assuage his guilt by talking to Castiel and Castiel is shocked that Dean blames himself for what happened. Dean and Castiel fight their way through Crowley's warehouse together, but Castiel leaves Dean behind to fight Crowley himself despite being in a weakened state from Purgatory that only gets worse when he uses his powers. Castiel later uses his powers to show Dean the truth about his staying in Purgatory, stunning Dean. When Naomi asks him to report on Sam and Dean, Castiel refuses but has no choice and later agrees to join Sam and Dean in their quest to get the second half of The Word of God from Crowley. In Hunteri Heroici, Dean is still confused how Castiel got out of Purgatory and asks Castiel how hes feeling. Castiel responds that he's fine and doesn't feel any effects from his escape from Purgatory. Castiel also confides in Dean his fear that if he returns to Heaven, he will kill himself out of guilt after seeing what he has brought there. While Dean is initially skeptical about Castiel becoming a hunter, after he proves vital to solving the case, Dean accepts it, even agreeing to let him ride "shotgun" in the Impala, something he'd previously refused.

In Torn and Frayed, Castiel goes to Dean for help in rescuing Samandriel. With Dean's help, Castiel manages to locate Samandriel, but refuses to listen to Dean when he tells him not to bring in Sam to help. When he brings Sam, Castiel yells at them to "stow their crap." Later, Dean realizes something is wrong after Castiel kills Samandriel and from the way he is acting.

In Remember the Titans, Dean prays to Castiel earnestly, practically begging for Castiel to look out for Sam who is clearly not doing well in his trials to close the gates of Hell forever. Despite Dean's pleas, Castiel does not respond or appear.

In Goodbye Stranger, Castiel is now so indoctrinated to Naomi's control that he has no problem with ruthlessly killing a copy of Dean and is shown to have killed hundreds of them in order to desensitize him. However, this may be as he knew they weren't really Dean. When he meets up with Sam and Dean again, Castiel admits that he heard Dean's prayer but is not back because of that and under Naomi's control, lies to Dean about why he is there and actively covers up what he is really doing. Castiel is the one who finally tells Dean that there is indeed something seriously wrong with Sam, explaining that Sam is damaged down to the subatomic level, something even Castiel can't fix. Castiel is forced to point out the angel tablet to Dean as it is angel-proofed and is ordered to kill him by Naomi. Castiel attacks Dean completely out of his control as despite his indoctrination, Castiel himself still refuses to harm the real Dean. Dean pleads with Castiel to stop and finally breaks through to him by reminding him that he is family and confessing that he needs him. Castiel stops his attack, choosing Dean over Naomi and Heaven and when he picks up the angel tablet, he is freed from Naomi's control fully. Castiel explains to Dean what happened and heals him, though Dean flinches when he reaches to do so, expecting another attack. Castiel leaves with the tablet, saying he must protect it from Dean as well for a reason he doesn't explain.

Naomi later visits Dean and, in an attempt to manipulate him, plays on his love for Castiel and suggests perhaps Castiel does not feel as strongly in return as he is missing. It is revealed Dean removed any angel proofing sigils from the bunker so Castiel could find and return to he and Sam.

In Clip Show, after reuniting with a severely wounded Castiel, Dean is angry with him and refuses to forgive Castiel for abandoning him again and not trusting him to the point that he fled with the angel tablet and got it stolen by Crowley. Castiel is noticeably hurt by Dean's anger, but Dean appears to feel Castiel should feel guilty for his constant disappearances. Though notably he insists Castiel stay behind to heal, which suggests he was working through his anger. In an attempt to make up with Dean, Castiel awkwardly shops for supplies while he is gone, buying Dean's favorite porn and trying to get him pie. When Castiel learns that there is no pie, he angrily grabs the minimart clerk, insisting that he needs the pie, but is interrupted by Metatron. As Castiel teams up with Metatron to close the gates of Heaven, he never returns with the supplies and Dean believes he has abandoned them again.

In Sacrifice, after Metatron is captured by Naomi, Castiel approaches Dean for help with the trials to seal Heaven. Dean is reluctant to leave Sam as he is so close to completing the Hell trials and suspicious of Metatron, but agrees after Sam insists. Dean helps with locating the third trial by bringing the angel tablet he has retrieved from Crowley to Kevin, but is shocked by Castiel's strong-arm tactics with Kevin. Dean and Castiel share a drink in a bar whilst waiting for a Cupid to show up. They discuss their possible fates and Castiel admits he may be killed for turning his back on heaven and attempting to shut the gates. When confronting the Cupid for her bow, Dean keeps Castiel from attacking her and they are able to simply convince her to give it to them by telling her about the situation in Heaven and promising to right it. When Naomi arrives and wants to talk, Dean is able to convince Castiel to hear her out and not attack outright and while Dean believes her, Castiel doesn't and remains angry that she forced him under her control for so long, and tried to make him harm Dean. At Dean's request, Castiel transports him back to Sam, but he refuses to stick around and help, annoying Dean.

In I Think I'm Gonna Like It Here, Dean, not knowing about Castiel being human after Metatron took his grace, prays to Castiel but as he does not respond, Dean reacts angry and desperate and expands his prayer to all angels because he really needs someone to heal Sam being about to die after almost finishing the trials to shut down hell. In the hospital Dean receives a phone call from Castiel telling him of his new humanity and asking him about recent events. When Dean tells him about Ezekiel, Castiel confirms that he is trustworthy and even calls him a good soldier. Castiel also tells Dean about meeting Hael but Dean states that Castiel should trust nobody because the angels are trying to find Castiel and they are "pissed". He convinces Castiel of leaving Hael on her own and coming to the Men of Letters bunker as soon as possible.
 * -|S9 =

In I'm No Angel days have passed since Dean told Castiel to come to the bunker but the former angel still has not arrived. Sam just tells Dean not to worry because Castiel is human now and, as a consequence, needs more time to travel when Ezekiel takes over and informs Dean about the angels organizing and Castiel being hunted. Because of this Dean and Sam are trying to find Castiel before the angels do. After learning that rogue Reapers are hunting Castiel, Dean calls on Ezekiel to find him, despite knowing its dangerous for the angel to be in control. Dean arrives in time to see the Reaper possessing April Kelly kill Castiel with an Angel Blade. Dean manages to kill April with the same blade she killed Castiel with, but it is too late because Castiel is already dead. Just after Dean realized this and starts to show emotions, Ezekiel takes over Sam's body again and revives Castiel without any hesitation.

Back in the bunker Castiel tells Sam and Dean about having sex with April who are very, very surprised by this and Dean even chokes on his burrito. Dean also gave Castiel a proud look for his experience though he laughed when Castiel states he had his angel blade as "protection" before Castiel admits being human was more exciting than he thought thanking the two for being teachers. As Castiel leaves the room Ezekiel shows up again and forbids Dean to let Castiel stay and if he does not tell him to leave, Ezekiel will leave Sam's body, causing him to die. Dean having no other choice informs Castiel that he can not stay and Castiel is only able to answer with an incredibly hurt look.

In Heaven Can't Wait, after getting wind of a possible case, Castiel calls Dean who comes to help and also to get away from research and to spend more time with him.. Feeling guilty for kicking him out of the bunker, Dean avoids Castiel at first, but eventually comes to him and recruits him as his partner in hunting for this hunt. Together they determine they are dealing with an angel and when Castiel goes to what he thought was a date, Dean gives him hot dating advice. Later, Dean realizes that Castiel is in trouble after recognizing a truck belonging to the vessel of the angel, Ephraim, as one he'd seen outside the house Castiel went to and he rushes to Castiel's aid. Though Dean is unable to defeat Ephraim, he tosses Castiel an Angel Blade as Ephraim is about to kill him, allowing Castiel to kill Ephraim and saving his life. Dean later returns Castiel to his new human life at his request and apologizes for kicking him out, but keeps the knowledge of the fact that Metatron's spell can't be reversed from him as he knows Castiel will feel immensely guilty for it due to his role in the expelling of the angels.

In the third episode, Soul Survivor, after Dean has become a demon and Sam has been trying to cure him, Dean and Castiel see each other for the first time of the season. Castiel helps Sam finish the treatment to cure him of the demonic part of him, and that problem is solved for the time being, even though Dean still has the Mark of Cain. At the end of that episode, Dean and Castiel have a talk in Dean's bedroom of the bunker, where they talk about how well each other looks, and Castiel's complicated grace issues. They then have a heart-to-heart about the issues the Mark of Cain and Castiel's stolen grace have caused.
 * -|S10 =

Dean and Castiel reunite shortly after The Darkness broke free from its prison. Still under the effects of the Attack Dog Spell, Castiel goes on a rampage, forcing Sam and Dean to go after him and force Rowena to undo the spell. In his madness, Castiel badly bruised Dean, but Dean refuses treatment since he deserved it from last time, when Dean - under the Mark of Cain's influence - nearly killed Castiel.
 * -|S11 =

For some time, Castiel provides the brothers with information on cases and certain monsters since both Dean and Sam insist he stays behind to recover.

After Dean's second encounter with Amara gets interrupted, Dean decides to return to the location they were before Amara teleported him away. However, the attack on Amara by the angels leaves the area toxic to Dean, so Castiel, after checking Dean's condition, offers to go there instead.

Dean meets Castiel again in Hell after Amara teleports the angel there so he can deliver a message. Dean, Rowena and Crowley are in the middle of preparing a spell to send Lucifer back to his Cage, when suddenly they hear fighting. Castiel follows Dean to where Lucifer has Sam trapped, and the two get teleported into the cage.

Dean, Sam and Castiel face off against Lucifer, though they prove no match. When Lucifer threatens to kill Dean unless Sam says "yes", Castiel pushes the archangel off of Dean and is promptly beaten up for his actions. Before Rowena can cast the spell, Castiel decides to say "yes" to Lucifer himself, a fact Dean does not find out about until much later.

Dean is distraught upon discovering that his friend has been taken by Lucifer, and despite Sam's insistence that Castiel may not want to come back because it was his decision, Dean resolves firmly to get Castiel back no matter what.

He acts on his word in Hell's Angel, when the brothers decide to lure Lucifer into a trap and use the angel suppressing sigil to enable Castiel to take back control of his vessel, and give Dean a chance to convince the angel to expel Lucifer. They manage to talk briefly, before the sigil fails and Lucifer taunts Dean over his concern for his friend. When Crowley gets trapped inside Castiel's vessel during his attempt to contact the angel, Dean is forced to spray holy water on Castiel to help him escape.

Dean's desperation continues to show even after Amara arrives and takes possession of Lucifer, who she proves is too weak to defeat her. He shouts for Castiel moments before Amara zaps herself and Lucifer away from the location. This failed attempt at rescuing Castiel does not, however, deter Dean's resolve to help him.

Unfortunately, Dean does not meet Castiel again for a couple of weeks. As Lucifer suffers torture at Amara's hands, God reveals himself to the brothers and becomes an ally in the war. They also meet a prophet, Donatello, who leads them straight to where Amara is holding Lucifer, and in turn, Castiel. Dean distracts Amara during this rescue mission, and though he fails to keep Amara away long enough, God helps teleport the rescue team to the bunker, and thus to safety.

Dean reluctantly accepts Lucifer's aid in the battle against Amara. When the plan instead fails and God is left dying on the floor of a warehouse, the team are seemingly left with an unconscious Lucifer. Dean goes to check on him once Amara has left, and finds to his immense relief that Lucifer is no longer there, but Castiel only, now in full control of his vessel.

Despite the danger they now face of the world ending, Dean takes Castiel on a road trip, to discuss about Castiel's reasoning for becoming a vessel and Dean's own opinion of the angel. Dean tells Castiel that he is "the best friend they ever had" and he is like a brother to the Winchesters. Their conversation soon gets interrupted by a call from Sam, informing them of a new plan.

It turns out that Dean is to become a bomb made out of thousands upon thousands of souls. Dean accepts this task for he sees he has no other choice. Dean bids everyone, including Castiel, farewell. The two share a hug. Dean tells Castiel to look out for Sam while he's gone.

When the sun is restored to its former glory, the team minus God and Dean believe Dean had succeeded in fulfilling his role. Thus, Castiel presumably thinks Dean is now dead.

Castiel and Dean are reunited, much to their mutual joy, when the two arrive at the Bunker. Castiel, who had been blasted away by Lady Toni Bevell, informs Dean that Sam has been kidnapped. In this instant, Castiel is introduced to Mary Winchester, much to Mary's surprise, who initially aimed a gun at him out of distrust.
 * -|S12 =

Dean goes off to where Toni is, but instead he gets captured and threatened by Toni. Castiel and Mary arrive shortly after and manage to free Sam and escape Toni's clutches. While Sam and Dean adapt to a life with their resurrected mother, Castiel goes off in search of Lucifer, refusing the brothers' help out of guilt and a sense of responsibility. In his absence, Castiel keeps Dean updated through phone calls.

Dean soon joins Castiel on the hunt, but is displeased to find him working with Crowley. The four (plus Sam) head to Los Angeles to try and prevent Lucifer from killing people while posing as the rock star Vince Vincente. Dean's displeasure in Castiel and Crowley's partnership shows when he complains about Castiel a few times. Castiel eventually encourages Dean to wear leather and fit in, by calling him "a lumberjack". When they discover Lucifer's plan to host a concert and where, Dean is visibly unhappy with Castiel's decision to join Crowley in stalling Lucifer while Dean and Sam chase out the fans. Castiel is dismissive of Dean's concerns.

Their plan does not work, and Lucifer escapes his vessel promising to wreak havoc due to his intensified anger towards God for abandoning him again. The four continue to search for Lucifer while Dean's dislike in Castiel's partnership with Crowley also continues. While tracking down Lucifer to President Jefferson Rooney's location, they are intercepted by the US Secret Service agents. Arthur Ketch makes a timely arrival and knocks the agents out. Since Arthur is a member of the British Men of Letters, Dean shows distrust in Castiel and asks the angel to check if Arthur is being dishonest or not. Castiel believes Arthur is able to twist the truth, so he's not entirely honest.

Despite their distrust, Dean and Sam borrow a weapon from Arthur and with Crowley and Rowena at their side, they resume tracking down Lucifer. Realizing Lucifer has conceived a child, they use Lucifer's lover Kelly Kline as bait. Lucifer falls into the trap, and using Arthur's contraption and Rowena's spellcasting, they are seemingly able to send Lucifer back to his Cage, though they at least rescue the President. Castiel takes Kelly away, inadvertently leaving Dean and Sam at the mercy of the Secret Service agents.

Castiel, much to his dismay, loses track of Kelly when she sneaks off on him at a diner. Castiel is further upset by Dean and Sam's disappearance. He waits two months in misery and despair until he finally gets a call from Dean. Castiel is overjoyed to hear from him, and even agrees to work with Mick Davies and Arthur Ketch in order to retrieve Sam and Dean from Site 94, a prison the Secret Service agents had taken them to, on suspicion of trying to assassinate the President.

Dean and Castiel's reunion is brief. On their way home, Dean and Castiel sit in the backseat. Castiel notices something odd about Dean and soon discovers from Billie - who intercepts them - that Dean had made a deal with Billie in order to escape the prison. Castiel becomes very frustrated by Dean's decision to sacrifice himself. Overwhelmed in anger and despair and a strong desire to keep all three Winchesters alive, Castiel kills Billie, willingly taking on any consequences just so the Winchesters stay alive.

Castiel's actions however, worry Dean greatly. He admits it upfront back at the Bunker that what Castiel did was reckless. Castiel appears apologetic but shows no regret in his sacrifice.

Later on, Dean joins Castiel in dealing with a garrison of angels Castiel once worked with, or more accurately, Dean tries to join. Despite Castiel's desire to confront his siblings on his own, Dean follows Castiel to a diner with Sam in tow and invites himself to sit and have a chat with Castiel's former captain Ishim. The two clearly do not like each other, however, Dean works alongside Ishim in order to protect him from a woman seeking vengeance for the death of her Nephilim.

Dean and Sam decide to confront the woman while Castiel and Ishim, the last of their garrison, await at a church. Dean is horrified to learn from the woman, Lily Sunder, that her daughter was human and the real monster is Ishim. Dean rushes back to the church, desperate to save Castiel. Ishim, after being healed by Castiel, appears healthy and strong while the latter is weak. Ishim tries to talk Castiel into ignoring Lily and Dean because they are humans, but Castiel ultimately chooses Dean's side, forcing Ishim to attack. Dean attempts to banish Ishim away with a sigil but realizes doing so would kill the injured Castiel. For his friend's sake, he doesn't activate the sigil.

Upon Lily's arrival, the brothers try to fight Ishim off but Ishim overpowers them all. He is killed by Castiel. Lily decides that for now she will try to spare Castiel in the murder of her daughter. The trio thus return home to the Bunker.

When Dean gradually loses his memory due to a spell cast by Gideon Loughlin, he tries not to forget Castiel, whom he recalls as a best friend. When he does forget, he is shocked to learn that he actually has an angel as a best friend.

Sometime after, Dean is enlisted by Mary to help with a case involving a powerful demon. Sam and Castiel join them as well as a hunter named Wally. The group infiltrate the demon's house, intent on killing it, but Sam and Dean's attempts prove futile and Castiel ends up gravelly injured thanks to the demon's special lance. With Wally also dead, the four make a run for it and hide inside a barn. Castiel, unable to recover from the injury, decides to confess his love to the trio, calling them family as he does.

When the demon, Ramiel, catches up to them, the three Winchesters fight him off and manage to kill him using his very own lance. Castiel continues to slowly and painfully die, until Crowley arrives and breaks the lance, much to Dean's shock.

While on a hunt for Kelly Kline and her unborn baby, Castiel gets sidetracked by Kelvin, who wants to take Castiel back to Heaven so he can join their siblings in an attempt to end the Nephilim's existence. Castiel agrees to do so without telling Dean, leaving Dean very worried once he finds out Castiel is missing.

Dean spends the next couple of days worrying over Castiel. He tries to contact Castiel once he and Sam get a lead on Kelly. Despite Sam and Dean and Eileen Leahy's efforts, they fail to retrieve Kelly due to her protector, Dagon, interfering. A couple of more days later and Castiel finally returns, and admits to having been in Heaven where there's poor reception. Dean is not amused, and angrily yells at Castiel for his long absence.

Dean retreats to his room, where Castiel soon goes to meet him. Feeling he has failed Dean again, Castiel tries to return a mixtape Dean had made for him, but Dean doesn't accept it and gives it straight back, telling Castiel to keep it because "it's a gift". Despite his outlash earlier, Dean shows genuine concern over the angel again, and reminds Castiel that they're Team Free Will, that Castiel is still part of the family and he matters just like the rest of them. Out of trust, Dean leaves his room to a get drink. He returns, much to his horror, to find not only Castiel gone, but The Colt as well, which he had kept under his pillow.

Castiel meets up with Kelvin and Hozai outside of Dagon's new hideout, the three intent on killing Dagon and Kelly. When Kelvin praises Castiel for choosing Heaven over the Winchesters, Castiel corrects him by telling Kelvin that he's doing this so Sam and Dean don't have to, knowing that this mission will force them to spill innocent blood.

Their attack on the hideout results in the death of Hozai, the capture of Kelvin, and Castiel escaping with Kelly. He drives Kelly to a motel when his truck breaks down, all the while trying to convince Kelly that her child is too dangerous to risk allowing to live. Dean and Sam soon reach their location. Dean is obviously not happy with the theft of The Colt or Castiel's decision to kidnap Kelly, and forces both to wait in The Impala while he and Sam decide what to do.

Kelly however, is inspired to go the Heavenly Portal by her son, and drives off with The Impala, leaving Dean and Sam with a broken truck and Castiel in the backseat. Dean fixes the truck while Castiel and Kelly meet with Heaven's new ruler Joshua at the Portal. Joshua plans on killing Kelly and her baby by making her walk through the Portal, but Dagon interrupts them, kills Joshua, and attempts to kill Castiel. Sam and Dean arrive and try to stop her, but Dagon proves immune to their attacks and even destroys The Colt. Dean watches helplessly as Dagon moves in to strike Castiel, but the angel receives power from Lucifer's son and is able to incinerate the demon. Castiel proceeds to heal Dean's arm, but when Dean tries to stop Castiel from taking Kelly away, Castiel knocks him and Sam out.

Back at the Bunker, Dean is very agitated by Castiel's behavior and believes Castiel is being mind-controlled by "Lucifer Jr." since the person he saw didn't remind him of Castiel. Dean's worries bother Sam who is unable to do anything about it. Sam's only assistance is to contact Jody Mills and have her open a wide search for Castiel and Kelly.

Castiel is shown taking care of Kelly before being found by the Winchesters. While still mad at Castiel for betraying them, Dean tries to convince Castiel to help them in the fight against Lucifer. He is successful as Castiel heals his wounded leg and shows Dean and Sam an alternate post-apocalyptic reality. When Lucifer stabs and kills Castiel, Dean is left devastated and standing over the corpse of his best friend's lifeless vessel.

In Lost & Found, Dean briefly stood over Castiel's corpse, grieving, before heading inside the cabin. After praying to God to bring back everyone they have lost fails, Dean decides to hold a Hunter's Funeral for Castiel. Alongside Jack, who sees Castiel as his father instead of Lucifer, the Winchesters burn Castiel and Kelly Kline's bodies outside the cabin.
 * -|S13 =

Castiel's death deeply affected Dean as he pinned most of the blame on Jack even threatening to kill him should lie to them like he did with Castiel. A good example was in Patience, where he argues with Sam about how trusting Jack cost Castiel his life and how he can't look at him as a result.

In The Big Empty, after awakening in The Empty, Castiel tells the Cosmic Entity that the Winchesters need him and demand for his release as he will fight it for all eternity if he has to until he is freed from the realm. At the end, Castiel is resurrected just as he demanded.

During Advanced Thanatology, Dean talks to Billie who noticed the change in him as he went to list the loved ones that he has lost and his failure to save them. He even states he would allow her to reap his soul if she wanted as he is just tired. Dean later lists Castiel among the people he lost to Sam bitterly stating he just needs one win to make him feel better. He later gets a call from a service phone, he is shocked that it's Castiel on the other line and he goes to the town he's at. Dean finds Castiel standing by a payphone and is shocked to see him alive again.

At the beginning of Tombstone, Dean question how Castiel can be alive as he explains that he was resurrected by the Cosmic Entity. Castiel explained he was sent The Empty as he describes his horrible experience in the void of nothingness. Dean embraces Castiel after confirming it is him, being happy that he truly returned and this causes him to somewhat move from his depression. This was seen when he told a curious Sam that Castiel returning was his big win.

In War of the Worlds, after Jack's departure from the Men of Letters bunker, Castiel revealed to Sam and Dean that he is meeting an angel then Dean suggested that he'd come with but Castiel disagreed because "his contact is already anxious about meeting [him] and won't speak in a presence of a stranger" and when Dean insists, Castiel told him that he was the one that swore to protect Jack so he should do it alone. Dean finally gave in and reminded Castiel to not do anything stupid before the latter exits the bunker. Unknown to Dean, Castiel was captured along with Lucifer by Asmodeus.

Season 4
Lazarus Rising
 * Dean shows Bobby the hand print on his arm.
 * Dean perks up when Pamela says Castiel.
 * Dean says that whoever got him out of hell, wanted him out.
 * Dean watches Castiel knock out Bobby.
 * Castiel and Dean stare at each other for a moment.
 * Dean stares at Castiel's wings.

'''Are you there, God? It's Me, Dean Winchester'''
 * Dean doesn't believe that he was "groped" by an angel.
 * Dean says that he almost got his heart ripped out, but Castiel reminds him that he didn't.
 * Castiel asks Dean if he thinks that the armies of heaven should follow him around.

In the Begining
 * Castiel sits on Dean's bed.
 * Dean jokingly calls Castiel a "Chatty Cathy".

Metamophosis
 * Dean tells Sam that Cas says he has to stop him.
 * This is the first time anyone calls Castiel by his nickname.

It's the Great Pumpkin, Sam Winchester
 * Dean watches Sam fumble his way through meeting Cas.
 * Castiel and Dean stare at each other as he decides what to do.
 * Castiel tells Uriel that Dean was saved for a reason, so he has to have potential.
 * Dean says that he's not interested in hearing "I told you so" from Castiel.
 * Castiel tells Dean he's not there to judge him.
 * Dean makes Castiel laugh.

I Know What You Did Last Summer
 * Anna tells Sam and Dean that the first words she heard were Cas saying that "Dean Winchester has been saved."
 * Dean looks surprised to see Castiel as he comes through the door.

Heaven and Hell
 * Dean calls Castiel heartless, and he confirms so.
 * Dean asks where Castiel is.
 * Uriel tells Dean that Castiel likes him.
 * Castiel is unable to look at Dean.
 * As Anna gives Dean a kiss goodbye, Castiel watches them, before awkwardly looking away.
 * Sam and Dean watch as Castiel tries to smite Alastair.
 * Just as Alastair is about to remove Castiel from his vessel, Dean takes a crowbar and knock him in the head, stopping him. Castiel watches as Anna gets her grace back and disappears.
 * Castiel watches Dean pick up the demon knife.
 * Castiel stops Uriel from attacking Dean.
 * Castiel and Dean share a look before Castiel disappears.

On The Head of a Pin
 * Dean sarcastically asks Castiel if he remembers Pamela, since he burned her eyes out.
 * Dean looks to Castiel as he stands there silently.
 * Castiel looks to Sam and Dean.
 * Castiel watches Uriel walk up to Dean.
 * Dean and Castiel share a look.
 * Dean makes a joke, but Cas doesn't get it.
 * Dean thinks that Uriel has a better sense of humor than Cas.
 * Dean walks towards Cas.
 * Cas watches as Dean goes into the room with tools.
 * Castiel listens to Dean torture Alastair.
 * Dean defends Heavens order of Dean torturing Alastair.
 * Cas looks to the door at the sound of Dean torturing.
 * As Alastair is about to kill Dean, Castiel comes up behind him and stabs him.
 * Dean catches a glimpse of Cas fighting Alastair before passing out.
 * Cas watches Dean in the hospital room.
 * Sam tells Cas to heal Dean, but Cas says that he can't.
 * Cas accuses Uriel of setting Alastair on Dean.

The Monster at the End of this Book
 * Dean looks between Chuck and Castiel.
 * Chuck and Dean both ask if he's kidding, but Cas isn't.
 * Dean is bewildered that Chuck is a prophet, and Cas comments that he should have seen Luke.
 * Dean asks how he got chosen, but Cas doesn't know, since it's above him.
 * Dean tells Sam that Cas told him that Chuck is a prophet.
 * Dean tells Sam that Cas told him about Alastair.
 * Cas and Dean stare at each other.

The Rapture
 * Dean tells Sam that he wouldn't be there if he knew what Cas wanted.
 * Dean notices Cas lying unconscious, and calls out to him.
 * Dean shakes Cas awake.
 * Dean asks Jimmy where Cas is.
 * Dean asks why Cas ditched Jimmy.
 * Anna tells Sam and Dean that Cas got dragged back to Heaven.
 * Dean tells Anna that Cas had something important to tell him.
 * Cas and Dean watch Sam drink demon blood and excorcise one of the demons.
 * Dean and Sam watch Cas switch vessels from Claire to Jimmy and walk away from Amelia and Claire.

When the Levee Breaks
 * Cas and Dean stare at each other for several moments.
 * Dean turns back and looks at Cas.
 * Dean and Cas stare at each other as the camera pans out.

Lucifer Rising
 * Dean turns to see Cas is there and tells him hello. He tells him that it's almost time.
 * As Dean is in the room alone, Zachariah and Cas appear.
 * Cas watches Zachariah explain to Dean what's going with Lilith.
 * Dean notices Cas not able to look at him as Zachariah talks.
 * Cas tells Dean "anything you wish" when he says he needs something.
 * Cas is unable to look at Dean as he tells him what's going to happen to Sam.
 * Dean hurts himself punching Cas.
 * Cas stops being able to look him in the eye, which Dean notices and moves his head so that he can.
 * Dean looks around the room sadly when Cas leaves.
 * Dean looks to Cas as he says they're making it up as they go.
 * Cas "dies" for Dean.

Season 5
Sympathy for the Devil
 * Dean tells Sam that their first priority is finding Cas.
 * Dean asks Chuck where Cas is, and Chuck tells him that he's dead. Dean asks if he's sure, since Cas could have just vanished.
 * Dean calls Cas a stupid bastard, Sam reminding him that he was trying to help them, but Dean says that's the point.
 * When Dean blasts away the angels, he yells that he learned it from his friend Cas.
 * Cas fights off and kills an angel as Dean watches.
 * Cas asks Zachariah how Dean and Sam got on the airplane, if it wasn't the angels.

Good God, Y'all
 * When Sam gets a call from Cas, Dean comments "Speak of the Devil".
 * Cas stands between Sam and Dean.
 * Dean jokes about trying Mexico, since he's on a tortilla, but Cas doesn't get it and just says that he's not on any flatbread.
 * Dean calls Cas "Chuckles".

Free to Be You and Me
 * Dean assumes that Cas wants revenge on Raphael.
 * Dean compares him and Cas to Thelma and Louise, confusing Cas.
 * Dean looks Cas over.
 * Dean buttons up Cas' shirt and straightens his tie.
 * When Cas asks why humans lie, Dean says it's how you become president.
 * Dean flips Cas' badge right side up.
 * Dean tells the detective that Cas is new.
 * Dean sarcastically thanks Cas.
 * Dean asks Cas how Jerusalem was, and he calls it arid.
 * Dean tells Chastity Cas' name.
 * Dean pulls on Cas' arm as they leave.
 * Dean places his arm around Cas' shoulder.
 * Cas and Dean look and smile at each other as they walk to the impala.
 * Dean acts as a look out for Cas.
 * Cas tells Dean to wait as they enter the house.
 * Dean and Cas watch Raphael black out the room (and the eastern seaboard).
 * Cas and Dean share a look as Raphael moves forward.
 * Dean tells Raphael it was Cas' idea, and Cas gives him a frustrated look.
 * Cas and Dean look to each other when Raphael says that God is dead.
 * Dean asks Raphael if dad "worked for the post office", referencing Cas the night before.
 * Cas covers Dean when the windows break.
 * Dean looks to Cas as he is yelled at by Raphael.
 * Dean looks between Raphael and Cas.
 * Dean and Cas look to each other after Dean encourages Cas.
 * Dean tells Cas he's not that much fun, and he still had more fun with him than Sam.

The End
 * Dean gets a call and, assuming it's Cas, angrily yells that he needs sleep.
 * Dean smiles at Cas.

I Believe that Children Are Our Future
 * When he sits down, he sets off a whoopee cushion put there by Dean.
 * Dean looks down at the ground sadly when Cas leaves.
 * Dean picks up Cas and places him on the fireplace mantle.
 * Dean tells Jesse that Cas isn't his friends.
 * Dean tries to get Jesse to turn Cas back.
 * Dean places Cas back on the mantle.

Changing Channels
 * Cas is about to get Dean and Sam out of TV land when Gabriel sends him away.
 * Dean asks Cas if he's okay, and Cas says he doesn't have much time.
 * Dean asks where Cas was sent. Gabriel says that Cas will live, maybe.
 * Dean points out that the way Gabriel looked at Cas, it was like he knew him.
 * Dean tells Gabriel that he's gonna bring Cas back, or he'll deep fry an Archangel in holy oil.
 * Dean asks Cas if he's okay, and Cas says that he is.
 * Cas follows Dean as they leave.
 * Cas joins Sam and Dean outside.

Season 11
The Bad Seed
 * Dean wraps a blanket around Castiel.
 * Dean cups Castiel's face and then pats his shoulder once Castiel is free of Rowena's spell.

Alpha and Omega
 * Castiel hugs Dean and tells him he could go with him.

Season 12
Regarding Dean
 * Dean tells Sam not to call Cas about his memory problems.
 * Dean is really excited to find out that his Best Friend, Cas, is an angel.
 * One of the things Dean is using to remember who he is, is that Cas is his Best Friend.

The Future
 * Dean made Castiel a mixtape of his "Top 13 Led Zeppelin Tracks" as a gift.

Season 13
Tombstone
 * Dean made Castiel watch the 1993 American western film, Tombstone

Scoobynatural
 * Dean helps Castiel up from the floor.

Children
Jack Kline

Cas, Dean and Sam, all raise and look after Jack. They each consider him their son.

Quotes
"You think the armies of heaven should just follow you around? There's a bigger picture here. You should show me some respect. I dragged you out of hell. I can throw you back in."

- Castiel to Dean

"Cas said, that if I don't stop you, he will."

- First time Dean calls Castiel, Cas

"Castiel? Oh he's, he's not here. You see he has this weakness, he likes you."

- Uriel to Dean.

"I'm hunted, I rebelled, and I did all of it for you."

- Cas to Dean

"So what, I'm Thelma, you're Louise and we're just gonna hold hands and sail off this cliff together."

- Dean to Cas

"Cas, not for nothing, but the last time someone looked at me like that...I got laid."

- Dean; Point of No Return.

"A part of me always believed you'll come back."

- The Born-Again Identity.

"We're family. We need you... I need you."

- Goodbye Stranger.

"I'd rather have you. Cursed or not."

- Survival of the Fittest.

"Let me bottom line it for you: I'm not leaving here without you. Understand?"

- What's Up, Tiger Mommy?.

"It's good to have you back, Cas."

- Tombstone.

"Don't make me lose you too."

- The Man Who Knew Too Much.

"Well, I said I needed a big win. We got Cas back. That's a pretty damn big win."

- Dean to Sam, Tombstone

"Dean, you know I always appreciate our talks, our time together."

- I'm No Angel.

"...So if there's even a small chance that we can save you, I won't let you out of this room."

- The Prisoner.

"Dean, I do everything that you ask. I always come when you call, and I am your friend."

- Let It Bleed.

"...the stench of that impala's all over your overcoat, angel."

- Crowley to Castiel.

"Ask him, he was your boyfriend first."

- Meg to Dean.

"Sorry, you have me confused with the other angel. You know, the one in the dirty trench coat who's in love with you."

- Balthazar to Dean.

Songs

 * Goodbye Stranger | Supertramp
 * Song plays in the same episode where Dean tells Cas he needs him


 * Angel With a Shotgun | The Cab
 * Considered the "Destiel song" by fans

Fanon
A majority of Destiel fans are very vocal in their beliefs that Dean and Castiel are romantically drawn to each other. Dean is often referred to as Castiel's favorite human. It is often joked that their first meeting was "love at first stab".

Many believe that Dean does not treat Castiel like a friend or a brother but more like someone he loves romantically. This is referring to the many moments on the show where there is sexual tension between the two. Characters in the show such as Metatron, Balthazar, Crowley, and Meg have made jokes about the two of them dating. Sam has often been caught in the middle of a "Destiel" moment, and has awkwardly had to cough to get the two to snap out of it.

Although some actors do not openly support Destiel, hints or mentions of the ship have appeared in various points in the series. Other actors, such as Misha Collins (Castiel) and Richard Speight Jr. (Gabriel the Archangel), have openly said they support the ship.

Some fans have created community groups based on a romantic relationship between Dean and Castiel.

On AO3, Destiel is the most written ship for Dean and Castiel and is the most written ship in the Supernatural (TV) tag.

Fandom
FAN FICTION
 * Dean/Castiel tag on FanFiction.net
 * Dean/Castiel tag on FanFiction.net

FORUMS

DEVIANT ART

TUMBLR

TWITTER

WIKIS
 * on
 * Dean/Castiel on Super-Wiki
 * Dean/Castiel on Super-Wiki

Trivia

 * Dean was the first to call Castiel "Cas".
 * In his debut, Castiel was tasked by Heaven to watch over Dean, and to date, it is the only command he has not failed to keep.
 * Following his departure or separation from Heaven, Castiel has relied on Dean to teach him how to be a hunter or a human. Needless to say, Dean is not the best teacher.
 * Dean was originally going to say "I love you" to Castiel in the Season 8 episode Goodbye Stranger but this was changed as they believed it was out of character.
 * In the season 2 premiere, In My Time of Dying, the doctor treating Dean tells him that he must have an angel looking out for him after he "mysteriously" recovers.
 * Both Urban Dictionary and Dictionary.com have definitions for Destiel.
 * The Destiel fanfic "Twist and Shout" by gabriel and stanbyme had the third most amount of kudos on AO3, before the deletion of "Dirty Laundry", then becoming the fic with the second most amount of Kudos. It also has the highest number of hits.
 * Destiel has made been on the Fandometrics most reblogged ships list several times:
 * It was the second most reblogged ship the week ending May 22nd 2017.
 * It was the fifth most reblogged ship the week ending May 1st 2017.
 * It was the seventh most reblogged ship the week ending May 8th 2017.
 * It was the tenth most reblogged ship the week ending May 29th 2017.
 * It was the fourteenth most reblogged ship the week ending April 15th 2019.
 * It was the fifteenth most reblogged ship the week ending May 15th 2017.

Variations

 * Cockles refers to the ship between their actors; Misha Collins and Jensen Ackles
 * Team Free Will refers to the ship between Sam Winchester, Dean and Castiel