Overview:Billy manages to sneak out of Amanda's apartment without detection. Alison asks him for a reconciliation, but he turns her down. Matt promises Nikki a Christmas party. Billy and Jake look for a tree for the courtyard, and end up running into Jo and Alison. Billy tries to fly home for Christmas, but can't get a flight. He plays Santa at Nikki's party. Alison finds him sneaking a present into her stocking during the night. They apologize and renew their relationship. A temporary nurse prompts Michael to reflect on his behavior. He apologizes to Jane and Robert. Sydney goes to confession and gives up hooking. Nikki returns to Russia.