ADDISON RETURNS TO SEATTLE TO PERFORM A DIFFICULT PROCEDURE ON MARK'S PREGNANT DAUGHTER, ON ABC'S "GREY'S ANATOMY"

Guest Starring Kate Walsh ("Private Practice") as Addison Montgomery and Kim Raver ("24," "Lipstick Jungle") as Teddy Altman

"Blink"� Mark flies Addison to Seattle to help with a difficult procedure on his pregnant daughter, Sloan, Owen questions Teddy's motives when she assigns Cristina the lead on a complicated surgery, and Derek's suspicions are raised when the Chief recruits Meredith to assist with a high profile operation on, "Grey's Anatomy," THURSDAY, APRIL 8 (9:00-10:01 p.m., ET) on the ABC Television Network. (Rebroadcast: OAD: 1/14/10)

"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, 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, Kevin McKidd as Owen Hunt and Jessica Capshaw as Arizona Robbins.

Special guest star Kate Walsh as Addison. Guest starring Kim Raver as Teddy, Cynthia Stevenson as Ruthie, Robert Baker as Charles, Nora Zehetner as Reed Adamson, Leven Rambin as Sloan and Sinquoa Walls as Tom Kates.

"Blink" was written by Debora Cahn 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. This program carries a TV-14,D,S parental guideline.

For more information on "Grey's Anatomy," visit ABC.com.