While walking by a nativity scene, Elaine discovers a baby boy who has been abandoned, and she tries to gain custody of him. Meanwhile, Billy asks Georgia to the firm's Christmas party; and Ally is determined to perform a sexy holiday song there, even though most everyone else is against the idea of her singing. Camaro: Wendy Worthington. Sandy: Gina Philips. McCabe: Robert Curtis Brown. Lynn: Linda Pine. Harold: Brad Wilson. Elaine: Jane Krakowski. Cage: Peter MacNicol. Ally: Calista Flockhart.