GEORGE�S FATHER UNDERGOES SURGERY ON HIS CANCER AND
MEREDITH�S FATHER VISITS HIS NEWS GRANDDAUGHTER
AT THE HOSPITAL, ON ABC�S �GREY�S ANATOMY�
George Dzundza (Harold O�Malley) and Jeff Perry (Thatcher Grey) Guest Star
�Six Days� � After a successful operation on his heart, George�s father undergoes surgery for his cancer, Thatcher Grey visits Seattle Grace in order to see his new granddaughter, and Meredith discovers that Derek has trouble sleeping soundly, on �Grey�s Anatomy,� THURSDAY, JANUARY 4 (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, 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, Kate Walsh as Addison Shepherd, Sara Ramirez as Callie Torres and Eric Dane as Mark Sloan.
Guest cast: George Dzundza as Mr. Harold O'Malley, Jeff Perry as Thatcher Grey, Debra Monk as Mrs. Louise O'Malley, Greg Pitts as Jerry O�Malley, Tim Griffin as Ronny O�Malley, Mae Whitman as Heather Douglas, Judith Hoag as Rhada Douglas, Steven W. Bailey as Joe, Sarah Utterback as Nurse Olivia, Moe Irvin as Nurse Tyler, Rhomeyn Johnson as manager, Jake Mailey as Uncle Jim and Michael James Thompson as Cousin Joe.
�Six Days� was written by Krista Vernoff and directed by Greg Yaitanes.
�Grey�s Anatomy� is broadcast in 720 Progressive (720P), ABC�s selected HDTV format, with 5.1-channel surround sound and Spanish audio via SAP.
A TV parental guideline will be posted closer to airdate.