Supernatural (TV series)/Recap/S05/E06 I Believe the Children Are Our Future

Season 5, Episode 6:

I Believe The Children Are Our Future
Sam and Dean are called to investigate a series of Deadly Pranks and discover that a boy named Jesse is inadvertently warping reality to fit his beliefs about the world. Castiel appears and informs the brothers that Jesse is an Anti Christ and insists that they kill him, but they opt to tell him the truth and he vanishes, leaving only a note saying that he wishes to keep his family safe.

Tropes

 * Anti Christ
 * Biting the Hand Humor: In "I Believe the Children Are Our Future", the owner of a magic/prank shop says that kids these days are only interested in their iPhones and kissing vampire movies. That episode of the show was sponsored by the first Cirque Du Freak movie.
 * A Date With Harry Palms: Dean in I Believe the Children are Our Future. Well, Dean in probably every episode, but in this one, it's..."confirmed."
 * Deadpan Snarker
 * Reality Warper