Castiel nods, always happy to see Sam, but honestly ... "Maybe we should just meet somewhere on earth if you're bringing Sam along. Not that he's unwelcome, but if I have the two of you I imagine I will be more than ready to escape myself."

He manages to offer Dean a genuine wry smile, because Dean knows what angels are like, and Cas knows he knows. Cas doesn't do well with bureaucracy now much better than Dean does.

"Don't stay away too long."