UPS
House MD: Kutner's Shocking Death & Why Kal Penn Left the Show
A number of characters were killed off over the course of House MD, but the most abrupt and shocking death of all came when Dr. Lawrence Kutner (Kal Penn) committed suicide in season 5, episode 20, «Simple Explanation.» Kutner had been introduced in season 4 as one of a large pool of applicants whom House (Hugh Laurie) — the medical Sherlock Holmes — forced to compete for a limited number of consultant positions.