Meet the parents

Christina Aguilera extols the marvels of motherhood in "Hello World!" a new six-part series in which celebrities gush over recycled footage from nature documentaries. The singer is an amiable narrator, even as cheetahs show their kids how to tear apart the skin of their prey, but the umpteenth playing of her "Light Up the Sky" single may cause viewers to crave hibernation.

7 p.m. Saturday, Discovery Channel

The dating game

Patti Stanger, TV's un-tender version of Tinder, returns as the "Million Dollar Matchmaker," belittling and barking at rich singles until she's sapped all the fun out of dating. Episodes of the series, renamed to reflect its new setting on the floor of a posh resort and its new cable home, should run with the disclaimer that its host has had three personal relationships fizzle out since the 2008 premiere.

9 p.m. Friday, We TV

Murder, they wrote

Despite the onslaught of trailers for "The Night Of" during the last season of "Game of Thrones," you probably aren't clearing out your Sunday night schedule to make sure you catch each episode of this eight-part miniseries as soon they're available. Reconsider. What's already been a stellar year for television is about to get even better, thanks to this hyper examination of a fictional New York City murder case, created with a killer combination of authority and pathos by Steven Zaillian ("Schindler's List") and novelist Richard Price ("Clockers"). For a full review, see Sunday's Variety section.

8 p.m. Sunday, HBO

Aguilera

Sister act

The three daughters at the center of "Escaping Polygamy" aren't going to be cast in a reboot of "Charlie's Angels" anytime soon, but they deserve credit for helping out teenage girls who realize that being forced to marry their forty-something uncles is no longer their idea of the American dream. The Season 2 premiere spends too much time trying to manufacture a spine-tingling thriller when it should be delving deeper into the psyche of families who chose this radical lifestyle.

9 p.m. Sunday, A&E

Neal Justin