DEREK'S CONFIDENCE AS A SURGEON IS SHAKEN LIKE NEVER BEFORE AS HE AND ADDISON FIGHT TO SAVE HIS PREGNANT PATIENT'S LIFE, ON ABC'S "GREY'S ANATOMY"

Guest Starring Oscar-Winning Hollywood Legend Faye Dunaway ("Network," "Chinatown") as Dr. Campbell

"Private Practice" Star Kate Walsh Continues Her Guest Stint at Seattle Grace

"An Honest Mistake" -- Derek's confidence is shaken like never before as he faces off with Addison over what course is best for their dying pregnant patient; Cristina calls the abilities of a renown surgeon into question after she botches a standard procedure; and Bailey, who has decided to pursue a fellowship in Pediatrics, is appalled by the Chief's less-than-stellar recommendation letter, on "Grey's Anatomy," THURSDAY, JULY 23 (9:00-10:02 p.m., ET) on the ABC Television Network. (Rebroadcast: OAD: 2/19/09)

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Katherine Heigl as Isobel "Izzie" Stevens, Justin Chambers as Alex Karev, T.R. Knight as George O'Malley, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Eric Dane as Mark Sloan, Chyler Leigh as Lexie Grey and Kevin McKidd as Owen Hunt.

Guest stars TBA.

"An Honest Mistake" was written by Peter Nowalk and directed by Randy Zisk.

"Grey's Anatomy" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound and Spanish audio via SAP. This program carries a TV-14,D,V parental guideline.

This episode of "Grey's Anatomy" will be available on ABC.com the day after airing on the network for users to watch online.