GREY'S ANATOMY - "Here Comes the Flood" - Things get tense between Meredith and Derek when Derek plans to kick Alex and Izzie out of the house, on "Grey's Anatomy," THURSDAY, OCTOBER 9 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/DANNY FELD) ELLEN POMPEO, PATRICK DEMPSEY