The X Factor: The season finale features performances from One Direction and Pitbull. The winner is announced (8 p.m. Fox).
The Real Housewives of Miami: After weather delays in Bimini, the women return home in the season finale (9 p.m. Bravo).
Project Runway All Stars: The designers must create vintage looks inspired by one of three 1920s events in this new episode (9 p.m. Lifetime).
It's Always Sunny in Philadelphia: The raunchy comedy series wraps its season (10 p.m. FX).
Jersey Shore: The summer's end is bittersweet as the gang leaves Seaside Heights in the season finale, shot before Hurricane Sandy ravaged the area (10 p.m. MTV). A reunion episode follows at 11.
The League: This series wraps its season with back-to-back episodes (10:30 and 11 p.m. FX).
A White House Christmas: First Families Remember: In this new special, host Meredith Vieira talks with first lady Michelle Obama and several of her predecessors — Laura Bush, Hillary Clinton, Barbara Bush and Rosalynn Carter — about the ways in which they've marked the season at the famous residence (8 p.m. NBC).
CMA Country Christmas: Classical singer Katherine Jenkins, R&B's John Legend and pop artist Colbie Caillat join more traditional country performers, including Keith Urban, Lady Antebellum, Martina McBride, the Band Perry, Dierks Bentley and Little Big Town, for this annual celebration. Jennifer Nettles of Sugarland returns as host (9 p.m. ABC).
2012 The End Is Now: Brad Meltzer connects the dots between ancient and imagined doomsday prophecy, science and human behavior in this apocryphal new special (9 p.m. History).
Pro basketball: The Oklahoma City Thunder visits the Minnesota Timberwolves (4 p.m. TNT); the Miami Heat visits the Dallas Mavericks (6:30 p.m. TNT).
College football: San Diego County Credit Union Poinsettia Bowl: BYU vs. San Diego State (5 p.m. ESPN).