Grey's Anatomy/How Insensitive
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How Insensitive is the twenty-first episode of the sixth season of Grey's Anatomy, and episode one hundred and twenty-three overall.
Starring: Ellen Pompeo (Meredith), Sandra Oh (Cristina), 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), Kim Raver (Teddy), Patrick Dempsey (Derek)
Guest Starring: (in credits order) Michael O'Neill (Gary Clark), Jesse Williams (Dr. Jackson Avery), Robert Baker (Dr. Charles Percy), Nora Zehetner (Dr. Reed Adamson), Sarah Drew (Dr. April Kepner), Jerry Kernion (Bobby Corso), Rosalie Ward (Melissa Corso), Abigail McFarlane (Jamie Anders), Mia Barron (Lauren Turner), Alyssa Shafer (Kelly Temple)