GREY'S ANATOMY - "Blink"- Mark flies Addison to Seattle to help with a difficult procedure on his pregnant daughter, Sloan, Owen questions Teddy's motives when she assigns Cristina the lead on a complicated surgery, and Derek's suspicions are raised when the Chief recruits Meredith to assist with a high profile operation on, "Grey's Anatomy," THURSDAY, JANUARY 14 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/ADAM TAYLOR) SANDRA OH