GREY'S ANATOMY - "Sometimes a Fantasy" - Cristina tries to help Preston cope with his hand tremor, Izzie attempts to return to the hospital for the first time since she quit the program, Alex deals with a patient who has a long history of injuries, and George and Callie's relationship moves forward, on "Grey's Anatomy," THURSDAY, OCTOBER 5 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/KAREN NEAL) SANDRA OH, PATRICK DEMPSEY