THE SEATTLE GRACE DOCTORS URGENTLY TREAT DOZENS OF PEOPLE INJURED AFTER A ROOF COLLAPSES AT A POPULAR ROMANTIC RESTAURANT ON VALENTINE'S DAY, ON ABC'S "GREY'S ANATOMY"

Guest Starring Kim Raver ("24," "Lipstick Jungle") as Teddy Altman

"Valentine's Day Massacre" �- It's Valentine's Day, and the doctors must treat dozens of injured people after the roof collapses at a popular romantic restaurant; Derek tries to manage his busy schedule as Chief of Surgery; Meredith wrestles with her new duties as the Chief's wife; and Mark and Callie team up to convince Sloan to do the right thing for her baby, on "Grey's Anatomy," THURSDAY, FEBRUARY 11 (9:00-10:01 p.m., ET) on the ABC Television Network

"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.

Guest starring Kim Raver as Teddy. Other guest cast TBA.

"Valentine's Day Massacre" was written by William Harper and directed by Stephen Cragg.

"Grey's Anatomy" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound and Spanish subtitles via secondary closed captioning. A TV parental guideline will be assigned closer to airdate.

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