I like how Dean just listened to Sam at the end of the last episode. He called him out, reminded him why what he did might bite them in the ass, but he didn’t shut down on him after that. He could see how shaken his brother was and he just listened to him, offered his solidarity, and was just…there. He didn’t take it personally like he often does- which ends up making things worse for both of them. He just listened and offered his familiar ‘we’ll get through this’ talk- which Sam might not be able to hear right now, but it’s important that he hears that even if he’s losing faith, Dean believes in them.
I like that Sam is having this very internal struggle- this helplessness and guilt (that they get people killed, that pretty much everything he set out to do since the beginning of the season has failed) but despite all of it he knows that if he knew how to share- Dean would be right there to listen to it. Usually the brothers are at odds when they end up in their dark places- so it’s interesting to see them both have these moments of weakness and self doubt as completely separate entities while they still have a solid relationship- because usually these moments of self loathing and guilt are because of something that is broken in that relationship.