"GREY'S ANATOMY - ""State of Love and Trust"" - As Derek begins his role as interim chief, he faces a potential lawsuit when Bailey and Meredith's patient awakens from anesthesia mid-surgery. Meanwhile, Teddy refuses to place Cristina on her service, as Arizona tests Alex out in Pediatrics, and Mark refuses to speak to a heartbroken Lexie, on ""Grey's Anatomy,"" THURSDAY, FEBRUARY 4 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/ADAM LARKEY)JESSICA CAPSHAW, CHYLER LEIGH, JUSTIN CHAMBERS, JESSE WILLAMS"