Supernatural - Season 4
Lazarus Rising
Are You There, God? It's Me, Dean Winchester
Lazarus Rising remains the best season opening so far. The introduction of Castiel is just awesome. This was back when you had respect for the angels, back when they were the most powerful beings around and didn't get bitch slapped by Leviathans. The second episode of Season 4 is also a good one and we get to see some familiar faces, such as Meg Masters and Agent Henriksen. And of course, it sets the stakes pretty high by having the Apocalypse looming over the horizon.