ChristinaChristina Aguilera sings “Light Up the Sky” about protective animal mothers and Usher sings “Strong” about a sea turtle in the first two episodes of “Hello World!” (Discover, 8 and 8:30 p.m.) which mixes pop songs from Joan Jett, Ellie Goulding, Dave Matthews and Steven Tyler with documentary footage celebrating Earth’s creatures, in collaboration with the World Wildlife Fund.

Track and field events in the U.S. Olympic Trials (NBC, 8 p.m.) from Eugene, Ore., include the men’s 110-meter hurdles, the 200-meter and 5,000-meter run and the triple jump. They will surely outdo anything on the contrived two hour “American Ninja Warrior” (NBC, 9 p.m.) rerun that follows.

Serena Williams goes for her 22nd Grand Slam women’s title this morning against Angelique Kerber in the women’s final at Wimbledon (ESPN, 9 a.m.).

“Outlander” (Starz, 9 p.m.) reaches its second season finale in a 90 minute episode in which Claire reveals the truth to her daughter in the present day while Jamie fights the Battle of Culloden in the 18th century.

If you thought: Hey, there should be more prison reality shows on the weekend, your wishes come true with “Jail: Big Texas” (Spike, 9 p.m.), focusing on county jails in the Lone Star State. It come between three new episodes of “Cops” (Spike, 8, 8:30 and 9:30 p.m.).

Johnny Depp is Whitey Bulger in the Boston crime saga “Black Mass” (HBO, 8 p.m.), making its premium cable debut. The other HBO has some pretty good movies on tonight: “Everest” (HBO2, 6:55 p.m.) and “The Martian” (HBO2, 9 p.m.).

Also on tonight: Tom Hiddleston and Jessica Chasten in Guillermo del Toro’s “Crimson Peak” (Cinemax, 9:50 p.m.) and Owen Wilson and Pierce Brosnan in “No Escape” (Showtime, 9 p.m.).

A former “Jeopardy” champion is a suspect in the 1994 nicotine poisoning of his wife on “48 Hours” (CBS, 10 p.m.).

From a network that likes to get sleazy with celebs, there’s “Princess Diana: Behind Closed Doors” (Reelz, 9 p.m.), hosted by Natalie Morales.

The network burns off a couple more episodes of the canceled sitcom “Angel from Hell” (CBS, 8 and 8:30 p.m.).

In the second season finale of “Dr. Jeff: Rocky Mountain Vet” (Animal Planet, 9 p.m.) moves to a new clinic after 25 years.

“Ghost Adventures” (Travel, 9 p.m.) travels to Deadwood, S.D.

Cullen exorcises demons on a new “Hell on Wheels” (AMC, 9 p.m.).

Sitting Bull and Crazy Horse make a decision on “The West” (AMC, 10 p.m.).

In addition to his home improvement show “The Vanilla Ice Project” (DIY, 10 and 10:30 p.m.), the former rapper has a new show in which he decides which of three projects pitched to him will be completed, “Vanilla Ice, Flip Advice” (DIY, 11 p.m.) in which he begins every consultation with “Word to your mother.”

The oft-forgotten Mel Brooks spoof “Robin Hood: Men in Tights” (BBC America, 7:30 p.m.) is on again.

On the new made-for-TV “Hidden Truth” (Lifetime, 8 p.m.), a woman tries to prove her brother’s innocent after he’s accused of murdering his niece.

Don’t know if you’ve noticed that Hallmark has been trying to confound your seasonal schedules (and maybe aid your air-conditioning) by showing its Christmas movies this month. Tonight has “Merry Matrimony” (Hallmark, 7 p.m.) and “12 Gifts of Christmas” (Hallmark, 9 p.m.).

Before she became a major Hollywood gossip columnist, Hedda Hopper was an actress, whose work is explored tonight on Turner Classic Movies, in George Stevens’ “Alice Adams” (TCM, 8 p.m.) with Katharine Hepburn and Fred MacMurray, “Downstairs” (TCM, 10 p.m.) with John Gilbert, “Men Call It Love” (TCM, 11:30 p.m.) with Adolphe Menjou and “Cross Country Romance” (TCM, 1 p.m.) with Gene Raymond and Wendy Barrie.

Later comes a couple of movies from the late 70s that Hedda Hopper was not in (see died, after all, in 1966 at the age of 80): “Stunts” (TCM, 2;15 a.m.) and “Roller Boogie” (3:45 a.m.).

Baseball today includes Detroit at Toronto (MLB, 1 p.m.), Yankees at Cleveland (Fox Sports 1, 4 p.m.) and Washington at Mets (Fox, 7 p.m.).

It’s U.S. vs. South Africa (fox Sports 1, 1:30 p.m.) in a women’s soccer international friendly. Later MLS games include Los Angeles at Seattle (ESPN, 3 p.m.).

In golf, third round play happens at the U.S. Women’s Open (Fox, 3 p.m.).

In NBA Summer League play, it’s Phoenix vs. Portland (NBA, 4 p.m.), Chicago vs. Boston (NBA, 6 p.m.), Memphis vs. Denver (NBA, 8 p.m.), Miami vs. Dallas (NBA, 10 p.m.) and San Antonio vs. Golden State (ESPN2, 10:30 p.m.).

It’s Jacksonville at Arizona (CBS Sports, 9:30 p.m.) in arena football.

And the Tour de France (NBC, 8 a.m.) at last reaches both broadcast TV and the mountains in Stage 8, one of the most difficult of the race, as it moves up Col du Tourmalet from Pau to Bagneres-de-Luchon.

Sturgill Simpson and Asleep at the Wheel perform on a replay of “Austin City Limits” (PBS, 11 p.m., check local listings).

The Melissa McCarthy-hosted “Saturday Night Live” (NBC, 11:30 p.m.) from earlier this year with Kanye West gets a repeat.