Supernatural: Jensen Ackles in On The Head of a Pin
Wow. What a fantastic episode!!! We got so many answers - Sam is drinking demon blood in order to get stronger, Ruby does have ulterior motives, Castiel is having doubts, Uriel was working against them (I'm assuming the whole time), Angels can get bodies back that have been destroyed, only angels can kill angels, and Dean is the one that broke the first seal.
Best of all, Jensen was absolutely amazing throughout the episode. When he was torturing Alistair, chills went down my spine. When he was talking to Sam in the car on the way to meet Ruby, I just wanted Season 1 Dean back - confident, strong, so sure of himself and what he was doing. When he was getting beaten up by Alistair, I could feel his pain. When he was talking to Cas at the end, he broke my heart. Again. That was my favorite Jensen moment - with the single tear rolling down his face, you could feel how much pain he was in, knowing that he was the one that started everything.