DEREK'S WHEREABOUTS ARE FINALLY DISCOVERED, ON ABC'S "GREY'S ANATOMY"

"How to Save a Life" - Derek witnesses a horrible car accident and springs into action to save lives, on "Grey's Anatomy," THURSDAY, APRIL 23 (8:00-9:00 p.m., ET) on the ABC Television Network.

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Josephine "Jo" Wilson, Jerrika Hinton as Stephanie Edwards and Kelly McCreary as Margaret "Maggie" Pierce.

Guest cast TBA.

"How to Save a Life" was written by Shonda Rhimes and directed by Rob Hardy.

"Grey's Anatomy" is broadcasted in 720 Progressive (720P), ABC's selected HTV format, with 5.1-channel surround sound. A TV parental guideline will be assigned closer to airdate.

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