The battle continues

“Vikings” returns with Ivar the Boneless (Alex Hogh Andersen) discovering that being king isn’t all it’s cracked up to be, with a new threat from Duke Rollo (Clive Standen). Until “Game of Thrones” returns in April, this may be the bloodiest, most diabolical game on the small screen.

8 p.m., History Channel

A legendary night

Kulap Vilaysack has been making the rounds with “Origin Story,” her emotionally draining documentary about a dark family secret. But the former Minnesotan comes from the world of comedy, which made her the perfect candidate to be the showrunner and co-executive producer of “A Legendary Christmas,” an upbeat holiday special hosted by John Legend and Chrissy Teigen. The guest list includes Awkwafina, Stevie Wonder and members of the Kardashian family.

The ultimate test

College kids panicking about year-end finals may want to use their next study break to get some inspiration from 2003’s “Homeless to Harvard: The Liz Murray Story.” Thora Birch earned an Emmy nomination for her role as a student who defied the odds to make it to the Ivy League. Minnesotan Kelly Lynch is terrific as her troubled mother.

Neal Justin