Grey's Anatomy/Brave New World
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Brave New World is the fourth episode of the fifth season of Grey's Anatomy, and the eighty-second 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), Brooke Smith (Erica), Patrick Dempsey (Derek)
Guest Starring: (in credits order) Amy Aquino (Marianne Grandy), Larry Brandenburg (Arnie Grandy), Bre Blair (Lauren Pailey), John Sloan (David Pailey), Steven W. Bailey (Joe), Kathleen Early (Dr. Daisy Pepman), Max Burkholder (Duncan Pailey)