Supernatural - Season 5 Episode 12 -

In Massachusetts, seventeen year-old nerd Gary uses witchcraft to swap bodies with Sam. Gary has lots of fun with the sexy Crystal and following Dean, who is hunting the witch Maggie Briggs. Meanwhile, Sam is trapped in the body of the teenager and trying to find out how Gary had succeeded in the black magic, and also trying to communicate with Dean. When Sam meets Gary's friends Trevor and Nora, he discovers that the intention of the teenagers that are playing a deadly game with the witchcraft.