House: Season 4, Episode 8

4 - 8: You Don't Want to Know

House encounters a magician whose heart fails when performing an underwater escape act. While the remaining fellowship candidates work to diagnose him, House is determined to prove he is a scam artist faking his ailments to cover up the fact he nearly drowned during his act. In the meantime, House pits his team against one another in a challenge involving Cuddy, granting the winner immunity from elimination and a chance to nominate two other candidates to be put on the chopping block.