Judging from a recent photo tweeted by Misha Collins, Castiel — or at least, a guy who looks like Castiel — will come into play as Sam spirals. “It’s not Castiel,” Jensen says. “It is, but it isn’t. First, Dean’s just gobsmacked. It even says ‘jaw to the floor,’ I think, when he sees him. I think there’s a lot of mixed emotions about it. He’s probably elated to have his friend back, and somebody who he knows that he can count on, even though he doesn’t know who he is — meaning Cas doesn’t know that he’s Cas. Personally, from an actor’s standpoint, I’m just glad to have the gang back together, so to speak.