DEREK AND ADDISON ARE SHOCKED WHEN SOMEONE FROM THEIR PAST RESURFACES, AND MEREDITH LEARNS MORE ABOUT HER FAMILY, ON ABC�S �GREY�S ANATOMY�

�Yesterday� � Someone from Derek and Addison�s past arrives in Seattle and shakes things up. Meanwhile, Burke learns about Christina�s secret and, after a visit with her mother, Meredith looks into more of her family�s dirty laundry, on �Grey�s Anatomy,� SUNDAY, FEBRUARY 19 (10:01-11:00 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, Isaiah Washington as Preston Burke, 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 and Kate Walsh as Addison Shepherd.

Guest starring are Kate Burton as Ellis Grey, Eric Dane as Dr. Mark Sloan and Jeff Perry as Thatcher Grey.

�Yesterday� was written by Mimi Schmir and Krista Vernoff and directed by Rob Corn.

�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.