"I Saw What I Saw" is the sixth episode of the sixth season of the American television medical drama Grey's Anatomy, and the show's 108th episode overall. It was written by Peter William Harper and directed by Allison Liddi-Brown. The episode was originally broadcast on the American Broadcasting Company (ABC) in the United States on October 22, 2009.The episode depicted events in a whodunit style, exposing them from alternating points of view in a fast-paced way. Katherine Heigl (Dr.