I'm very bad at choosing "favorite" episodes, because I like so many of them. Even the eps I don't particularly like always have *something* in them to recommend them, I think. (That "something" usually involving Jensen in some way. Heh.)

Lazarus Rising was one of the best season openers, with one of the best reveals, in the history of Ever.

And Monster Movie is still one of my very favorites. (Big pretzel!)