Elf: Buddy’s Musical Christmas (8 p.m., NBC) – In this 2014 animated musical special, Santa Claus tells the story of Buddy’s trip to New York to meet the father he never knew.
Vikings (9 p.m., History) - Lagertha attempts to fulfill a long-held ambition, and Ragnar negotiates an unexpected concession from King Ecbert. In the “Real Vikings” episode at 10, “Vikings” creator Michael Hirst and actor Clive Standen visit Viking sites with Viking experts, investigating Ragnar Lothbok and his sons.
Game Changers with Robin Roberts (10 p.m., ABC) – Roberts travels the country spending time with Lin-Manuel Miranda, Michael Phelps, Chance the Rapper and others.
Code Black (10 p.m., CBS) – A citywide blackout during a code black leaves the staff in chaos.