Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, and Chandra Wilson were cast members on the sixth season of "Grey's Anatomy." Other cast members in season six were Sara Ramirez, Patrick Dempsey, Chyler Leigh, Eric Dane and Kevin McKidd.
Cast members playing new recurring characters in season six were Nora Zehetner, Robert Baker, Sarah Drew, Jesse Williams, and Jason George.
"Grey's Anatomy" is a medical drama airing on ABC in the United States. Season six spanned 24 episodes with the premiere on Sept. 24, 2009. The season finale was aired on May 20, 2010. Danielle Panabaker, Sara Gilbert, and Demi Lovato made guest appearances during season six.