Survivor (8 p.m., CBS) – A winner is chosen in the Season 35 finale. A reunion show airs at 10.
The Librarians (8 p.m., TNT) – Santa takes Flynn, Baird and Jenkins on his first vacation in centuries.
Top 12 Christmas Movies of All Time (9 p.m., The CW) – Dean Cain and friends count down popular holiday films.
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Vikings (9 p.m., History) – Ivar meets his match in Bishop Heahmund.
Dian Fossey: Secrets in the Mist (9 p.m., National Geographic) – The final installment of the three-part series examining the life and murder of primate researcher Dian Fossey.
NOVA: Bird Brain (9 p.m., UNC-TV) – Scientists test avian aptitude with brainteasers that reveal acute intelligence.