GREY'S ANATOMY - "Here Comes the Flood" - Meredith and Cristina listen to the Chief as he lays out his 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) CHYLER LEIGH, ELLEN POMPEO, SANDRA OH