But no, seriously, I’m really excited for more Sam & Cas scenes. I’ve always adored their love-hate dynamic, in that they clearly love each other, but don’t particularly like each other, and I think that’s what makes what he does for Sam’s sake in “The Born Again Identity” extra powerful.
When they first meet in Season 4, Sam doesn’t get why Cas doesn’t automatically adore him, like everybody else they’ve ever met, and I think maybe he resents Cas a little for that; Cas (and the rest of the angels) makes him feel as inferior or tainted as he’d always feared he was.
And that Cas still prefers Dean over Sam, even now, still rankles him. I mean, just look at how Soulless!Sam treats Cas; when he has no inhibitions or guilt to stop him, Sam is openly hostile to Cas, threatening him and attempting to force him to do what he wants. That dynamic didn’t come out of nowhere.
Then of course Cas dies, which completely shatters Dean, and it’s gotta be hard for Sam to watch his brother go through all this grief and misery without resenting the man at the center of it just a little eensy bit. (I know if I were Sam, I couldn’t.) But then Cas takes on Sam’s hell-scars, and it breaks him apart, and Sam feels incredibly guilty about that, that his pain was so bad it literally broke an eternal being, and AUGH there’s just so much juicy tension there, I love it.
So yeah, I’m super happy that the writers plan to sink their teeth into this relationship even more in the episodes ahead.