Once upon a time
Cameron Boyce, who died this summer, doesn't get much of the spotlight in "Descendants 3," but the fairy-tale franchise has always been more about girl power. In what's billed as the last chapter, Dove Cameron and her female co-stars get the best songs and dance moves, with director/choreographer Kenny Ortega bringing his magical touch. You may not think the movie dazzles as much as the MGM musicals; your kids will beg to differ.
7 p.m. Friday, Disney Channel
More than a fantasy
"Worlds of Ursula K. Le Guin" gives fellow sci-fi writers a chance to sing the icon's praises, including Neil Gaiman and Michael Chabon. But this "American Masters" documentary is most powerful when we hear from teenagers just now being wowed by works like "The Left Hand of Darkness," a reminder that great novels are timeless.
9:30 p.m. Friday, TPT, Ch. 2
A sketchy start
Comedian Robin Thede has assembled a strong cast for "A Black Lady Sketch Show" and even recruited big names like Angela Bassett and Kelly Rowland to make cameos. But too many of the early bits feel like outtakes from an improv class.
10 p.m. Friday, HBO
The real jungle book
Oscar winner Lupita Nyong'o narrates "Serengeti," a six-part series about the daily triumphs and struggles of animals in northern Tanzania. The stars include Tempo, an elephant wobbling into adulthood, and Bakari, a baboon committed to raising an orphaned child.
7 p.m. Sunday, Discovery Channel
Neal Justin
Singing, ceremonies and straw hats: Olympics opening ceremony in Tahiti centers Polynesian culture
![Viva Froeming, left, touched the face of friend Virginia Goering as her twin sister Vera Sims looks on. The three ladies, all 101 years old, have been](https://arc.stimg.co/startribunemedia/ZRFTXJFYUVHBTFGD4UNQNYTEGI.jpg?h=91&w=145&fit=crop&bg=999&crop=faces)
Three 101-year-old friends recall fond memories in 1940s Alexandria
Celine Dion makes musical comeback at Paris Olympics with Eiffel Tower serenade
![Former Gophers diver Sarah Bacon, right, will compete with Kassidy Cook in the women's 3-meter synchronized springboard competition at the Paris Olymp](https://arc.stimg.co/startribunemedia/N37HMV3KY5CYPB4SIMTKQVIH7M.jpg?h=91&w=145&fit=crop&bg=999&crop=faces)