A WATER LEAK BECOMES A FLOOD, WREAKING HAVOC AT SEATTLE GRACE HOSPITAL, ON ABC'S "GREY'S ANATOMY"

Amy Madigan ("Gone Baby Gone") Returns as Dr. Wyatt

"Here Comes the Flood" � A plumbing leak becomes a deluge and wreaks havoc at Seattle Grace, as the Chief attempts to implement new teaching policies and George tries to retake his residency exam; meanwhile Derek hopes to move the roommates out of Meredith's house, to their surprise, on "Grey's Anatomy," THURSDAY, AUGUST 6 (8:00-9:00 p.m., ET) on the ABC Television Network. (Rebroadcast. OAD 10/9/08)

"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, Chyler Leigh as Lexie Grey and Brooke Smith as Erica Hahn.

Guest starring Amy Madigan as Dr. Wyatt, Daniel J. Travanti as Barry, Jim Ortlieb as Jack, Samantha Quan as Shelly and Suzy Nakamura as Jenn.

"Here Comes the Flood" was written by Krista Vernoff and directed by Michael Pressman.

"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 parental guideline.

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