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GREY'S ANATOMY- "Here Comes the Flood" - Derek and Cristina perform a test on a patient, on "Grey's Anatomy," THURSDAY, OCTOBER 9 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/ERIC McCANDLESS) SANDRA OH, PATRICK DEMPSEY
In This Photo: Cristina Yang, Derek Shepherd