MEREDITH, CRISTINA AND BAILEY COME TO LEXIE AND SADIE'S RESCUE WHEN A ROUTINE SURGERY GOES HORRIBLY WRONG, ON ABC'S "GREY'S ANATOMY"

Guest Starring Kevin McKidd ("Rome") as Owen Hunt and Melissa George ("Alias," "In Treatment") as Sadie

"In The Midnight Hour" � Meredith, Cristina and Bailey come to Lexie and Sadie's rescue when a routine surgery goes horribly wrong, as Owen and Derek treat a man seriously injured while sleepwalking and Mark comforts the sleepwalker's distraught daughter, on "Grey's Anatomy," THURSDAY, APRIL 2 (9:00-10:02 p.m., ET) on the ABC Television Network. (Rebroadcast. OAD: 11/20/08)

"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, and Chyler Leigh as Lexie Grey.

Guest cast TBA.

"In The Midnight Hour" was written by Tony Phelan and Joan Rater and directed by Tom Verica.

"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,S 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.