GREY'S ANATOMY - "Life During Wartime" - Cristina, Lexie and Izzie are shocked when Owen stabs live pigs for them to treat. Alex mostly just thinks it's cool, on "Grey's Anatomy," THURSDAY, OCTOBER 30 (9:00-10:01 p.m., ET) on the ABC Television Network." (ABC/ERIC MCCANDLESS) SANDRA OH, CHYLER LEIGH, KATHERINE HEIGL, JUSTIN CHAMBERS