The Self-Destruct Button

Derek and Meredith try to spend a night together at Meredith's, but their appearance the next morning does more harm than they expected and leads Bailey to tell Meredith to end it. Alex treats a self-mutilation patient, while Izzie's patient literally won't let go of his girlfriend. Meanwhile, George is suspicious that an anesthesiologist is drinking on the job and Cristina fills ill with flu-like symptoms.