Grey's Anatomy/An Honest Mistake
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An Honest Mistake is the sixteenth episode of the fifth season of Grey's Anatomy, and the ninety-fourth episode overall.
Starring: Ellen Pompeo (Meredith), Sandra Oh (Cristina), Katherine Heigl (Izzie), Justin Chambers (Alex), T.R. Knight (George), Chandra Wilson (Miranda), James Pickens, Jr. (Richard), Sara Ramirez (Callie), Eric Dane (Mark), Chyler Leigh (Lexie), Kevin McKidd (Owen), Patrick Dempsey (Derek)
Guest Starring: (in credits order) Kate Walsh (Addison), Jessica Capshaw (Arizona), Jennifer Westfeldt (Jen Harman), Ben Shenkman (Rob Harman), Kathleen Early (Dr. Daisy Pepman), Louis Giambalvo (John Terzian), Brandon Scott (Intern Ryan), Faye Dunaway (Dr. Margaret Campbell)