TV HIGHLIGHTS

Riverdale, 8 PM on Ch. 26: To prove he’s willing to give Frank (guest star Ryan Robbins) another chance, Archie (K.J. Apa) gets his uncle a job at Andrews’ Construction in the new episode “Chapter SixtyEight: Quiz Show.” Betty (Lili Reinhart), meanwhile, pours all her energy and concentration into taking down Stonewall Prep in the Quiz Show Championship, and Veronica and Cheryl (Camila Mendes, Madelaine Petsch) go in together on an unlikely business venture. Casey Cott and Cole Sprouse also star.

Harry & Meghan: The Royals in Crisis, 8 PM on Ch. 19 and Ch. 45: The recent decision by Prince Harry, Duke of Sussex, and his wife, Meghan Markle, to step away from their traditional responsibilities as senior figures in the British royal family is the focal point of this one-hour investigative special from the TMZ new service. Speculation ran rampant in the immediate aftermath of the couple’s announcement, but this program includes comments from sources close to the two young royals to shed light on the outside tensions that led to their decision, and what it could mean to the monarchy.

Vikings, 10 PM on HIST; 2:03 AM on HIST: Bjorn (Alexander Ludwig) gets a reality check and is forced to reconsider where his true enemies are when Erik (Eric Johnson) returns from a scouting mission bearing some very troubling information in the new episode “Resurrection.” Bjorn realizes he may need to rally his allies, prompting him to wonder whether former foe King Harold (Peter Franzén) might be willing to join him. Meanwhile, Ivar (Alex Hogh Andersen) is reunited with someone close to him.