GREY'S ANATOMY - "Damage Case" -- The interns deal with a family involved in a car accident, Derek lets his emotions get the best of him, and Burke and Izzie make a new suggestion to Denny, on "Grey's Anatomy," SUNDAY, MAY 7 (10:00-11:00 p.m., ET) on the ABC Television Network. (ABC/RON TOM) KATHERINE HEIGL