ALEX'S BROTHER PAYS AN UNEXPECTED VISIT, AND THINGS LONG KEPT SECRET ABOUT ALEX'S PAST ARE REVEALED TO FRIENDS AND FELLOW DOCTORS, ON ABC'S "GREY'S ANATOMY"

"Sympathy for the Parents" - When Alex's younger brother, Aaron, shows up at Seattle Grace-Mercy West with a hernia, it's up to Alex to get Bailey's approval for his pro bono surgery. Matters are further complicated when Aaron discloses that his family has not heard from Alex since he arrived in Seattle, and parts of Alex's past long kept secret are revealed to his friends and fellow doctors, on "Grey's Anatomy," THURSDAY, APRIL 1 (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 Sarah Drew as April, Jake McLaughlin as Aaron, and Jesse Williams as Jackson. Additional guest cast TBA.

"Sympathy for the Parents" was written by Allan Heinberg and directed by Debbie Allen.

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

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