Cristina refuses to quit, like she thinks Preston has. Finn and Derek refuse to quit on Meredith, who insist that they date her. Izzie won't quit standing out front of Seattle Grace, waiting for the time she feels is right to see Dr. Webber. Mark won't quit on giving up on Addison, who now realizes her marriage to Derek is over. And Alex wishes she would quit picking him as her intern in the OB-GYN department.