Which television show created by Matt At one and Trey Parker has an episode where the main characters join a cult led by David Blaine and call themselves "blaintologists"?
Super Best Friends:  In the episode, Stan, Kyle, Cartman and Kenny discover the magician David Blaine performing in South Park and decide to join his cult, the Blaintologists. South Park (season 5): Season five of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on June 20, 2001.
South Park