When Dean asked Cas, "Are you God?" I sat up straight in my chair. I would have BOUGHT that. Chuck as God (when it doesn't fit with 3/4 of what we saw over the 2 seasons) makes me roll my eyes. There's a fine line to walk when you preen about your work (particularly *in* the work) and Kripke didn't manage it. It got way too self-congratulatory, way too, "Screw you if you don't like it."

Could Cas bring back Kim Manners? That would work.