LOL, I meant episode 18 of season 5 (which I just finished watching). Haha, I know I'm super late to join the bandwagon on the whole Dean/Castiel ship, but although I liked Castiel, I was pretty much indifferent toward the idea of Dean/Castiel until maybe a few eps before 5x18. I was really not a fan of season 4, or the whole heaven/hell showdown at all.

Come to think of it, it's a wonder I even finished watching the show... though I did definitely enjoy moments in the latter half of season 5.