I quite enjoyed this ep. The flashbacks of Sam were good, especially with the interruption and Dean's "Now I feel dirty" line... I thought this was particularly effective because of the way the Sam/Ruby scene echoed the Sam/Madison scene in S2 ;)

I like that I don't actually agree with what the Castiel wants to do come the end of the episode... that said, I get the impression he doesn't want to do it, but knows he has to. It's your classic big picture-little picture problem.

I didn't want the ep to end there! I want the next episode now!

Misha Collins (Castiel) is, imo, rocking this show. Man knows how to steal a scene.