Grey's Anatomy/New History
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New History is the ninth episode of the sixth season of Grey's Anatomy, and episode one hundred and eleven overall.
Starring: Ellen Pompeo (Meredith), Sandra Oh (Cristina), Katherine Heigl (Izzie), Justin Chambers (Alex), Chandra Wilson (Miranda), James Pickens, Jr. (Richard), Sara Ramirez (Callie), Eric Dane (Mark), Chyler Leigh (Lexie), Kevin McKidd (Owen), Jessica Capshaw (Arizona), Patrick Dempsey (Derek)
Guest Starring: (in credits order) Kim Raver (Dr. Teddy Altman), Joel Grey (Dr. Singer), Robert Baker (Dr. Charles Percy), Jesse Williams (Dr. Jackson Avery), Nora Zehetner (Dr. Reed Adamson), Steven W. Bailey (Joe), Loretta Devine (Adele Webber)