Dean’s actions kills me here. He’s scared shitless in this scene, scared for his little brother, scared for his angel…but he looks Sam in the eyes and puts a smile on his face, and a pretty damn convincing smile at that. He doesn’t know what’s going to happen, or how they’re going to begin to figure it out. But for Sam, he’s willing to try. Sammy is his little brother, there’s nothing Dean wouldn’t do for him.
It’s always been like that, and it always will be. Because no matter what, they choose family. Always.