The Twelve Trees of Christmas (8pm, Lifetime) - A children’s librarian tries to save her beloved Manhattan library from being demolished to make way for a developer to build high-rise loft apartments. To generate media attention, she holds a Christmas tree decorating contest, but the ambitious developer hires a professional decorator to win the competition for him. Whaddaya want to bet they fall in love? It stars Lindy Booth, Melanie Brown, Robin Dunne, Casper Van Dien and Matt Baram.
The Christmas Ornament (8pm, Hallmark) - A recent widow struggles to embrace the holiday season until she meets a charming tree-shop owner who gives her a special ornament symbolizing hope.
The Challenger Disaster (9pm, Discovery / Science) - An original movie starring William Hurt as Dr. Richard Feynman, who investigated the cause of the Challenger space shuttle explosion on January 28, 1986.
Pit Bulls and Parolees (10pm, Animal Planet) - A midnight rescue sends Tia, Tania and Perry after an injured dog. Also, an old friend helps out when the kennel is near capacity, and a dog’s chance at a forever home is ruined by an unforeseen danger.
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Saturday Night Live (11:29, NBC) - Lady Gaga hosts and also serves as musical guest.