Elsewhere on Friday ...
Chuck (7 p.m., NBC/Ch. 5): In "Chuck versus the Santa Suit," a computer virus threatens to ruin Christmas at Buy More.
Olive the Other Reindeer (7 p.m., CW/Ch. 30): Charming 1999 animation. (Repeat)
National Lampoon's Christmas Vacation (7 p.m., ABC Family): 1989 comedy. (Repeat)
A Christmas Carol (7 p.m., TNT): Patrick Stewart stars in this 1999 TV movie. (Repeat)
Christmas with the Mormon Tabernacle Choir (8 p.m., PBS/Ch. 7): Taped a year ago, the MoTabs are joined by soon-to-be LDS missionary David Archuleta and Michael York. (Repeat)
Sanctuary (8 and 10 p.m., Syfy): In the first of a two-parter, the team races to prevent the unleashing of a doomsday weapon.
Elsewhere on Saturday ...
NFL football: Denver Broncos at Buffalo Bills (11 a.m., CBS/Ch. 2); New York Giants at New York Jets (11 a.m., Fox/Ch. 13); Philadelphia Eagles at Dallas Cowboys (2:15 p.m., Fox/Ch. 13)
College football (6 p.m., ESPN): Honolulu Bowl - Nevada vs. Southern Mississippi
The Sound of Music (6 p.m., ABC/Ch. 4): This 1965 classic isn't a Christmas movie, but it's certainly got the right spirit. (Repeat)
A Christmas Story marathon (6 p.m., TBS): The 1983 movie airs every two hours, continuing until 6 p.m. Sunday.
It's a Wonderful Life (7 p.m., NBC/Ch. 5): "Teacher says, every time a bell rings an angel gets his wings." Classic 1946 film. (Repeat)
The Nerdist: Year in Review (7 and 11:30 p.m., BBC America): Counting down the year's top nerd moments.
The Graham Norton Show (8 p.m., BBC America): Matt Smith ("Doctor Who") guests on the annual holiday special.
Elsewhere on Sunday ...
NFL: Chicago Bears at Green Bay Packers (6:15 p.m., NBC/Ch. 5)
The Simpsons (7 p.m., Ch. 13): This season's holiday episode - which flashes 30 years into the future - is definitely worth watching. (Repeat)
Doctor Who (7, 9:20 and 11:40 p.m., BBC America): This year's Christmas episode is a "Chronicles of Narnia" take-off titled "The Doctor, the Widow and the Wardrobe."
Leverage (7 and 10 p.m., TNT): The team searches for a philanthropist's missing wife.
Masterpiece Classic (8 p.m., PBS/Ch. 7): In "Downton Abbey," the rivalry between Mary and Edith intensifies. (Repeat)