Begin the Begin

As the new year unfolds, Izzie vows to let Alex's affair go, and it comes easier when she hits it off with Denny Duquette, a heart transplant patient. George treats Bex, a teen hermaphrodite, with a tumor and Alex treats a man who ate his novel after not being pleased with the results. Meanwhile, Derek talks with Meredith's mom, Addison expresses her disgust with Derek's living arrangements, and the residents, especially Cristina, have a hard time dealing with the new work limit.