[ The fact that Cas thinks it's a sick joke? Maybe that cuts a little deeper than either of them would have guessed back home. Things are different here and so is he. But not so much that he doesn't feel something ugly slide into his chest before he forces it down and shakes his head. ]

This place pulls people from wherever the hell it wants. You were dead. Now you're not.

[ It's the kind of idea that hurt to think about when he first arrived because it made him so angry. That he'd had no choice or say in being here at all. It still does. But alternate timelines are something he'd already known about. ]

There's another version of you here. From the other timeline. [ He pauses, has settled his gaze on Cas clutching that bottle. ] From where past me's from. Except they stopped the apocalypse.

[ And Dean now knows that he fails at that. ]