"GREY'S ANATOMY - ""In The Midnight Hour"" - Meredith, Cristina and Bailey come to Lexie and Sadie's rescue when a routine surgery goes horribly wrong, on ""Grey's Anatomy,"" THURSDAY, NOVEMBER 20 (9:00-10:01 p.m., ET) on the ABC Television Network.  (ABC/RON TOM) ELLEN POMPEO, SANDRA OH, CHYLER LEIGH"