Reminder during hiatus of latest Destiel canon:
12x03 - 12x09 Dean is illogically pissy with Cas for teaming up with Crowley.
12x15 - Dean is illogically pissed that Cas is looking into Angel killings. Again.
Dean is believed to be Castiel’s weakness and mirrored as his love interest by Ishim.
Dean would rather put himself in danger from Ishim than risk danger to Cas.
Dean isn’t angry that Cas cares about them so much he put himself in danger, he is worried.
Cas says I love you while avoiding eye contact with anyone. The camera pans only to Dean.
Cas says I love all of you looking at Sam then finally a lingering stare at Dean.
The camera pans to Dean. His lip wobbles for the second time that day, the first being when Cas told him he was dying.
Dean threatens Crowley, Sam and Dean both risk themselves to try to save Cas.
Dean can’t watch Cas in his final moments
and looks like he may even be praying.
Crowley saves Cas, looks to Dean and says ‘you’re welcome’.
Dean tells Cas they’re going home.
Mary is the reason Cas almost died. For the colt. Which she didn’t admit to when they were looking for a cure for Cas. Which Sam used to kill the Alpha.
Dean doesn’t know all this.
Cas leaves home ‘for the greater good’ and Dean is pissy about it. Again. Undertones of worry re: end of 12x10.
Meanwhile Dean thanks Crowley sincerely for saving Cas.
Bonus Dean focused 'things that are important’:
Dean canonically is underneath it all a sweet, soft man who is kind to Rowena, loves Disney films and cartoons, riding Larry, is up for 'live skinemax’ and is still a badass hunter even with no memories.
His facade has been coming down small piece by small piece all season.
We have heard NO(?) rock music since ‘Rock never dies’ - interesting metaphor.
Cas and Crowley are the only main characters who haven’t lied to Dean’s face this season.
Dean is an excellent lie detector and strategist and generally reads people very well…