South Park: The inappropriate animated sitcom kicks off a mini-marathon of Christmas-themed episodes (7:59 p.m. Comedy Central).
The X Factor: The finalists sing for the fences in Part One of the talent competition's two-night season finale (8 p.m. Fox).
Too Fat for 15: Fighting Back: This documentary series about overweight teens ends its season (8 p.m. Style).
Work of Art: The Next Great Artist: The latest winner is revealed in this reality competition's season finale (9 p.m. Bravo).
Food Attack: The darker side of dining is explored in this new series (9 p.m. Food).
The Soup: Host Joel McHale reveals previously unseen clips in this new installment " (10 p.m. E!).
American Horror Story: The creepy drama starring Dylan McDermott, Connie Britton and Jessica Lange ends its freaky freshman season (10 p.m. FX).