Ready to disavow every work by one of America’s most talented and prolific filmmaker for the last half century? The harrowing four-part “Allen v. Farrow” (HBO, 9 p.m.) slams a legacy like no work since the Michael Jackson-damning “Leaving Neverland” (also on HBO) to make one reconsider everything in light of the barrage of evidence Mia Farrow produces of child abuse, including a lot of family home footage, surreptitiously recorded audio, as well as a methodical debunking of official records the filmmakers claim were covered up due to the Allen’s celebrity.

The only time Allen is heard from is from self-serving press conferences from more than 25 years ago and the audiobook narration from Allen’s memoir last year, “Apropos of Nothing.”  The series by Kirby Dick, Amy Ziering and Amy Herdy is disturbing and thoroughly dismaying stuff, but it raises questions about devotion to celebrity, separating art and art-maker and whether to ever watch another Woody Allen film (HBO’s answer is clear: A half dozen of his titles are currently streaming on HBO Max).

If you have a stomach for another off-putting entertainer, “Supervillain: The Making of Tekashi 6ix9ine” (Showtime, 10 p.m.) tells the story of the purposely repugnant rapper who advanced his career by linking up with gangs, only to rat them out in the end. Karam Gill’s three-part documentary is interrupted by its own annoyance – the building of a villain action figure. 

“All Creatures Great and Small” (PBS, 9 p.m., check local listings) ends its season at a Christmas Eve party.

Eliza gets to the bottom of her father’s death on the season finale of “Miss Scarlet and the Duke” (PBS, 8 p.m., check local listings). 

After being bumped by a rain-delayed Daytona 500 last week, “The Great North” (Fox, 8:30 p.m.) gets to have its premiere tonight.