Tune in Tonight: Sex and scandal on the tennis court

Streaming on AMC+ and Sundance Now, the new series “Fifteen-Love” stars Ella Lily Hyland (“Silent Roar”) as Justine Pearce, a once-promising teen tennis prodigy who rocks the sports world with allegations of sexual abuse against her former coach, Glenn Lapthorn (Aidan Turner, “Poldark”).

The action flashes back to Justine’s promising beginning and her gradual unraveling under the pressure of Grand Slam competition. After taking a hiatus of five years to heal, she is emotionally triggered by the sight of Glenn taking another young woman under his wing.

This leads some to question her story and its motivations. Is this he-said/she-said scandal inspired by real trauma? Or intense disappointment and professional jealousy?

The first two episodes will stream today, with subsequent helpings dropping weekly on Thursdays.

— The (swinging) arms race between HBO and Netflix continues. HBO has just begun its four-part, stranger-than-life docuseries “Chimp Crazy” on Sunday, directed by Eric Goode of “Tiger King” fame. Netflix counters with the relatively sober documentary “Secret Lives of Orangutans,” narrated by David Attenborough. “Lives” follows a multi-generation clan of the higher primates living in the treetops. Everybody starts somewhere. And the baby orangutans seen here are never far from their mothers’ embrace. Per Attenborough, this explains why the survival rate for their species is much higher than other great apes.

As in nature documentaries dating back to “Meerkat Manor” and Disney films of yore, animals are provided with names and backstories to make their melodrama easier to follow. What’s not entirely easy to follow is Attenborough’s British pronunciation of the word “Orangutan.” He seems to insert another syllable in there, if possible.

— “Mermaid Magic” (Netflix) offers a feature-length CGI movie shot through with a pastel palette. It’s a bit like watching a toy box come to life. And that seems intentional.

Also streaming on Netflix: the third season of “That ’90s Show” and the debut of the Taiwanese police comedy “GG Precinct.”

— Set in an elite world where lawyers flaunt wealth, dress like movie stars and walk in slow-motion to a hip-hop score while defending their best friends on murder charges, the legal procedural “Reasonable Doubt” streams its second season on Hulu.

— Everyone loves a sure thing. And for some time now, Kevin Costner has been just that. “Yellowstone” and its many spinoffs have been among the most-watched series on any form of television, from cable to streaming and network. Costner’s old movies like “Bull Durham” (8 p.m., MLB) and “Field of Dreams” (9:15 p.m., TruTV, TV-14) continue to be cable favorites.

But Costner’s recent passion project “Horizon: An American Saga” failed rather dramatically at the box office. What explains that? Was it the film’s three-hour running time? Or the fact that it was part of a continuing “saga” that viewers thought might work better as a limited series? Was Costner overexposed on “Yellowstone” or too successful at becoming a TV star to get people to get to the movies?

The line between the big screen and small has never been blurrier. That becomes clear when even a sure thing can’t deliver.

TONIGHT’S OTHER HIGHLIGHTS

— The Atlanta Braves host the Philadelphia Phillies in MLB action (7 p.m., Fox).

— Coverage of the Democratic National Convention (8 p.m., PBS; 9 p.m., NBC and ABC and 10 p.m., CBS) unfolds. In addition to network and cable coverage, the event can be livestreamed on TikTok, Instagram, YouTube, X, Twitch, Facebook and Amazon Prime Video throughout the proceedings. Viewers can also stream the convention at the DNC website, offering coverage in both English and Spanish.

— A murdered therapist left a patient list teeming with possible suspects on “Law & Order” (8 p.m., NBC, r, TV-14).

CULT CHOICE

A mystery writer (Bette Davis) disposes of her pesky husband (Gary Merrill) in the 1951 mystery “Another Man’s Poison” (8 p.m., TCM, TV-PG). The co-stars married in real life after appearing in “All About Eve” the year before.

SERIES NOTES

An eviction is in order on “Big Brother” (8 p.m., CBS, TV-PG) … “Press Your Luck” (8 p.m., ABC, TV-PG) … The unkindest cut of all on “Young Sheldon” (9 p.m., CBS, r, TV-PG) … A few renovations on “Ghosts” (9:30 p.m., CBS, r, TV-PG).

LATE NIGHT

Live from Chicago on “The Late Show With Stephen Colbert” (11:35 p.m., CBS) … Jimmy Fallon welcomes Zoe Kravitz and Sabrina Carpenter on “The Tonight Show” (11:35 p.m., NBC) … RuPaul, Bill Skarsgard, FKA twigs, Gabby Thomas and Pepe Aguilar appear on “Jimmy Kimmel Live!” (11:35 p.m., ABC).

Amy Poehler and Fred Armisen visit “Late Night With Seth Meyers” (12:35 a.m., NBC) … Taylor Tomlinson hosts Anna Faris, Melissa Villasenor and Andy Richter on “After Midnight” (12:35 a.m., CBS, r).