The sixth season of the American television medical drama Grey's Anatomy, commenced airing on the American Broadcasting Company in the United States on September 24, 2009, and concluded on May 20, 201
Katherine Heigl departed in the middle of the season, citing a desire to spend more time with her family.
The sixth season finale of Grey's Anatomy consisted of two parts, "Sanctuary" and "Death and All His Friends". Both parts, encompassing the twenty-third and twenty-fourth episodes of the season, were
Mandy Moore guest-starred in the episode as a patient of Miranda Bailey.