With Castiel drifting further and further away from them and into Crowley's manipulative plan to crack open Purgatory, Dean can only hope that the angel will say something in time for him to be saved from his own undoing.
Everyone knew it was a suicide mission, but their 'Fearless Leader' had insisted on going anyway. And when Dean doesn't return with the rest of the group, it's up to Cas to venture into the Croat infested city to save him.
Juliette accidentally reveals her secret to Nick. Things don't go over exactly like she thought they would.
If someone had told Dean that at some point in his life he'd be proposing to an angel of the Lord, he would probably have laughed and wondered what drugs that person was on.
Castiel is assigned to guard the soul of the human who will one day be known as the Righteous Man. However, things don't always go as they're planned and watching over his charge is not as easy as he wishes it to be.
Castiel visits the bunker to say one last goodbye to Dean.
Long after their link is established, Dean's grown used to Cas' presence in the back of his mind. When Cas is attacked by Metatron's followers and that connection wavers and threatens to disappear, only then does Dean realize how much he fears the silence in his head and how much he fears losing his angel.
Sam and Dean have been tossed into our world by Balthazar's spell. But what happened to Jared and Jensen?
Dean's never liked talking about feelings. But as always, he's willing to make an exception for Cas.
Sam, Dean, and Cas head out to investigate strange deaths in a small town in North Dakota. Same old hunt as always, at least until Cas gets possessed by the demon they're hunting and Dean has to deal with what comes after.
All things have an end, but sometimes they're not always happy ones.
Castiel is having trouble dealing with his recently attained mortality and the emotional baggage that comes with it. He has no idea how humans deal with it every day, but luckily, Dean is there to help him cope.
It's April Fool's Day and Sam is sorely mistaken when he believes that Dean won't initiate their usual prank war. Luckily, someone unexpected reappears to help him exact his revenge.
After obtaining the first blade, Dean finally kills Abaddon and Crowley. But rather than him and Sam finally being at peace, he ends up where he least expected. On the throne of Hell.
There had been 1,142 copies of Dean that Naomi had conjured up for him to kill. He knows because he counted.
Of course it would take a shapeshifter in the form of Castiel to get him to realize how important the fallen angel is to him. But he's Dean Winchester and he always has to do things the hard way.
Dean almost dies on a hunt. Again. He doesn't see why it's such a big deal but Cas isn't too pleased about it and it affects him much more than Dean had anticipated.
Canon-AU: Merlin is captured by Morgana after she ambushes Arthur and the knights during a hunting trip. Uther forbids Arthur to search for him and three years pass before they meet again, only this time Merlin is serving a different master.