Supernatural Castiel Timeline

A timeline of Castiel's relationship with Dean and Sam from the first time he showed up until he came back from the void. A little bit about jsut his development as a character

Seasons 4

an introduction to loyal angel Castiel and his cohort Uriel. Castiel appreciated humanity and has a conscience but is just as determined to do ANYTHING to stop the apocalypse. but because of Dean, finds a new way to live a new way to win and better priorities. He is a recurring character only who ultimately betrays Heaven to help Dean.

Season 5: Castiel is a bad ass who is working with Dean and Sam as Lucifer and the Archangel Michael get ready to duke it out. Sam is Lucifer's vessel and the angels want Dean to become Michaels vessel in the final show down. Castiel has become a main cast member and a true friendship between Cass and Dean blooms quickly. 

Season 6: There's a civil war in Heaven that Dean and Sam don't give a damn about they need him now, every time. Cass is a little angst-y but is perfectly able to kick butt. In the end he deceives and betrays Sam and Dean, getting into a deal with the king of Hell Crowley. He basically goes mad with power.

Season 7: Mostly absent after a self-sacrifice, trying to fix what he broke.  Has amnesia or brain damage when he first returns. He and Dean work out thier crap and both get sent to purgatory.

Season 8: Dean escapes purgatory and a few episodes later, so does Cass. Completely and totally done with Heaven, Cass joins the brothers as a hunter and there is the strongest Destiel feel yet. The three of them are family. But his relationship with Dean is...special. Naomi mind controls him for several episodes causing the brothers to notice he's even more 'off' than usual. There's an AMAZING episode with an absolutely glorious scene where a brainwashed Cass is beating the crap out of Dean who refuses to defend himself. Thier bond, and the power of the angel tablet, breaks Naomi's hold over him. The season finale? ANGELS FALL.

Season 9: This is where Dean starts becoming a self-righteous jerk just for the sake of writing conflict into the show. Something that Thank God doesn't last more than this season. This is where Dean kicks Cass out without explanation, lies to Sam about why and never even really explains to Cass why he kicked him out. Cass has tender moments of protectiveness and friendship with Sam. Dean starts getting affected by something called the Mark of Cain. Also features the only angel other than Castiel who gets how important humans are and shares his sense of honor. An angel named Gadreel who introduces himself as 'Ezekiel'. You can guess how well that went down.

Seasons 10-12 are them being brothers to each other through everything. Being family to each-other and growing closer. This is where Destiel moments started to feel like teases and just queer-baiting. Castiel runs away from them partway through season 12 and actually dies. Like they hold a funeral for him and burn his body. He comes back a few episodes into season 13 having pissed off an ancient entity so badly that it spit him back out.

Almost everything after that is well, old hashed on worn out tired inconsistent stuff. Dean resumes being poorly written and his anger and 'I don't give a crap' drill sergeant-ness becomes the norm. Lucifer's son Jack arrives and calls Castiel his father. Lucifer was basically a surrogate but while in his human mother's womb Jack chose Castiel to be his father/protector. Jack dies, they bring him back to life in a way that damages his soul. the more the he uses his powers to protect Dean/Sam/Cass the less of his soul will remain. When it's revealed how soulless he is. Not evil but a lack of good. That's when Dean becomes such an f-inn sanctimonious hypocrite and the writers are no longer trying. If they were Sam would have stood up to Dean and defended Cass. Ultimately Dean rails against Castiel being the father of an "inherently soulless monster that you've been defending" and Cass actually leaves the bunker, not because Dean was wrong, but because Dean can't forgive him and is holding onto anger and for the first time in 12 years, isn't giving him the benefit of the doubt. This is where you know Season 14 proves Cass is absolutely romantically in love with Dean,  because no one would ever take THIS  much crap from anyone and think nothing about it unless he were in love with them.

Dean needed to loose what he had in order to admit for the first time how much he'd taken Cass for granted and how badly he'd treated the man. And THAT was a beautiful moment. But what the writers used as an excuse in order to get there was pathetic. They were basically married for the final season. But the writers had long since stopped trying and the episodes made no sense. I HATED God and Death and Billie and any of it. The other two protagonists, Mary and Bobby basically disappeared with barely any explanation what so ever by season 14.