GREY'S ANATOMY - "Here Comes the Flood" - Mark listens as the Chief lays out the new rules for SGH, on "Grey's Anatomy," THURSDAY, OCTOBER 9 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/DANNY FELD) ERIC DANE, PATRICK DEMPSEY, KATHERINE HEIGL (FOREGROUND), BROOKE SMITH