Grey's Anatomy Rundown: Episode 19, "Elevator Love Letter" Well, if you think about that title, you might get a basic idea about what goes down on this week's Grey's. Derek returns to the hospital to be one link in the giant chain of doctors now trying to save Izzie's life. Meanwhile, Izzie tries adjusting to being a patient instead of a doctor, some disturbing things happen with Owen, and George . . . has a couple of lines. Ready to chat?