From ABC's official press release:
Izzie's mother makes a surprise and less-than-welcome visit to the hospital, as Thatcher Grey returns to make amends with his daughters, Meredith and Lexie, on ABC's Grey's Anatomy.
Guest starring Emmy-nominated Sharon Lawrence (NYPD Blue, Desperate Housewives) as Izzie's mother, Robbie.
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As preparations continue for Meredith and Derek's wedding, Izzie receives a surprise hospital visit from her handful-of-a-mother, Robbie. Meanwhile, a newly sober Thatcher visits his daughters, Meredith and Lexie, in order to make amends, and the Chief and Meredith bitterly fight over a controversial medical case, on Grey's Anatomy
, Thursday, April 30 (9:00-10:02 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, T.R. Knight as George O'Malley, 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 and Kevin McKidd as Owen Hunt.
Source: ABC(Image courtesy of ABC)