PREVIEW: Tonight's GREY'S ANATOMY

"Life During Wartime" - To help Bailey become the best general surgeon at Seattle Grace, the Chief gives her new power, new responsibility, and the challenge of removing a young girl's inoperable tumor, as the new head of trauma, Owen Hunt, challenges both the attending doctor's methods and the residents' surgical abilities, on GREY'S ANATOMY, Thursday, October 30 (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, 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 are Kevin McKidd as Owen, Scott Haven as Randy, Lauri Johnson as Grandma Ruth, Brandon Scott as Intern Ryan.

"Life During Wartime" was written by Mark Wilding and directed by Jim Frawley.