Meet the full cast and crew of Grey's Anatomy including actors, directors, producers, and more. Learn more about the full cast of Grey's Anatomy with news, photos, videos and more at TV Guide Grey's Anatomy Sanctuary (TV Episode 2010) - Cast and crew credits, including actors, actresses, directors, writers and more. The first five primary characters who are first presented as interns and later on progressed in the surgical program after a year are Alex Karev (Justin Chambers), George O'Malley (T.R. Knight), Meredith Grey (Ellen Pompeo), Cristina Yang (Sandra Oh), and Izzie Stevens (Katherine Heigl). Derek takes Cristina out on a fishing trip; Teddy tries to help a patient who lacks the proper insurance to seek medical treatment. The seventh season of Grey's Anatomy premiered September 23, 2010 and ended May 19, 2011. It was broadcast on Thursday nights at 9 PM on ABC. The season consists of 22 episodes. The seventh season of the American television medical drama Grey's Anatomy, began airing on September 23, 2010 on the American Broadcasting Company (ABC), and concluded on May 19, 2011 ending the season with a total of 22 episodes. New relationships emerge and the strongest commitments are tested. From successes in the operating room to mistakes in the bedroom and all the thrilling drama in between the doctors find a way to survive as long as they lean on one another. Following O'Malley's death and Stevens' departure, Jesse Williams and Sarah Drew joined the cast as new residents from Mercy West Jackson Avery and April Kepner both having made their series debuts as recurring characters in the sixth season. Grey's Anatomy (TV Series 2005– ) - Cast and crew credits, including actors, actresses, directors, writers and more.