A DEVASTATING MASS SHOOTING AT A LOCAL COLLEGE CAMPUS HITS A LITTLE TOO CLOSE TO HOME FOR ALL THE DOCTORS, ON ABC'S "GREY'S ANATOMY"

Guest Starring Scott Foley ("The Unit," "Felicity"), Peter MacNicol ("Ally McBeal") and Tom Irwin ("My So Called Life")

"Disarm" - News of the incoming mass causalities after a gunman opens fire at a local college hits the staff hard when they must spring into action, even while their own wounds are still fresh; and Arizona does not receive a warm welcome home at the hospital, on "Grey's Anatomy," THURSDAY, JANUARY 6 (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, 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, Jessica Capshaw as Arizona Robbins, Kim Raver as Teddy Altman, Jesse Williams as Jackson Avery and Sarah Drew as April Kepner.

Guest cast TBA.

"Disarm" was written by Krista Vernoff and directed by Debbie Allen.

"Grey's Anatomy" is broadcasted in 720 Progressive (720P), ABC's selected HTV format, with 5.1-channel surround sound. This program carries a TV-14,L parental guideline.

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