Good Mourning (Grey's Anatomy)

"Good Mourning" is the first episode and the season premiere of the sixth season of the American television medical drama Grey's Anatomy, and the show's 103rd episode overall. Written by Krista Vernoff and directed by Ed Ornelas, the episode aired on the American Broadcasting Company (ABC) in the United States on September 24, 2009.

In the episode, the doctors of Seattle Grace Hospital grapple with the shocking revelation that a dead John Doe is actually their beloved co-worker George O'Malley (T. R. Knight). Other storylines include Izzie Stevens' (Katherine Heigl) recovering from her near-death experience, and Callie Torres (Sara Ramirez) and Izzie debating whether to donate O'Malley's organs. Meanwhile, Derek Shepherd (Patrick Dempsey) is offered the position of Chief of Surgery, a role currently held by Richard Webber (James Pickens, Jr.).

Although the episode was fictionally set in Seattle, Washington, filming took place in Los Angeles, California. The episode is the first part of a two-hour season premiere, followed by "Goodbye". It marks the first episode without Knight following his departure from the series and the first to feature Jessica Capshaw (Arizona Robbins) as a series regular. Guest stars include Mitch Pileggi, Debra Monk, Shannon Lucio and Zoe Boyle.

Upon its original broadcast, "Good Mourning" was watched by 17.03 million viewers in the United States, ranking #1 for the night, and earned a 6.7/17 Nielsen rating/share in the 18–49 demographic. The episode received positive reviews from television critics, with Ramirez's performance receiving high praise.