Supernatural - Jensen Ackles, Jared Padalecki

As CW's Supernatural nears its 100th episode (Thursday, April 15, 9/8c, CW), we want to know: What is your favorite episode from all five seasons?

Was it the very first time you laid eyes on the handsome Winchester brothers, Sam and Dean, in the pilot? Perhaps it was Season 2's "In My Time of Dying," when Daddy Winchester kicked the bucket. Or perhaps you were a fan of the recent "Dark Side of the Moon"?

Tell us your favorite, if it's even possible to pick just one, and let us know why it tops your list.