NorthKoreasDeadlyDictatorThings change so quickly these days it must be hard for “Frontline” (PBS, 10 p.m., check local listings) to keep fully up to date. In covering the escalating tensions with North Korea, who knows what the latest goading has been to the derisively nicknamed “Rocket Man” or what test missile has since been launched?

A new report on “North Korea’s Deadly Dictator” tonight begins with Trump’s tough talk at the UN but switches to that unbelievable story from February when Kim Jung-un’s half brother Kim Jong-nam was attacked in the airport in Kuala Lampur by a pair of women when a chemical agent who may have thought they were participating in a TV prank show. The ruthlessness of the act toward a family member indicates the danger of the North Korean leader, argues the report by Jane McMullen.

It may be chilling to watch a music festival from Las Vegas, but here’s the first half of the “IHeartRadio Music Festival” (The CW, 8 p.m.) that includes performances by Pink, Coldplay, Harry Styles, Chris Stapleton and The Weeknd. Ryan Seacrest is host.

How dd this happen? Manny is dropped off to start college on “Modern Family” (ABC, 9 p.m.).

Forest Whitaker begins a run on “Empire” (Fox, 8 p.m.), as the show hits its 50th episode.

A new case on “The Blacklist” (NBC, 8 p.m.) involves a billionaire who is also an art thief.

A second night of “Queen Sugar” (OWN, 10 p.m.) helps resume the season

Hannah closes in on patrick Lloyd on “Designated Survivor” (ABC, 10 p.m.).

A figure from Laura’s past threatens to jeopardize the case on “Liar” (Sundance, 10 p.m.).

“Nature” (PBS, 8 p.m., check local listings) returns for its 36th season with a story about a baby elephant born in a sanctuary in Botswana.

It’s the 45th season for “Nova” (PBS, 9 p.m., check local listings) which features a blacksmith recreating ancient armor.

Romance blossoms on “Survivor” (CBS, 8 p.m.), which is usually not a great thing.

Pops’ war stories bore Adam on “The Goldbergs” (ABC, 8 p.m.).

Nancy Pelosi is guest on a Town Hall (CNN, 9 p.m.) hosted by Chris Cuomo.

Maya fights for more full-time aides for special needs students on “Speechless” (ABC, 8:30 p.m.).

“Expedition Unknown” (Travel, 9 p.m. must have run out of planetary stops. Tonight, it begins hunting extraterrestrials at NASA.

“Little Women: Dallas” (Lifetime, 9 p.m.) begins its second season.

Danielle Staub makes her return in the eighth season premiere of “The Real Housewives of New Jersey” (Bravo, 9 p.m.).

Films featuring duels are on Turner Classic Movies with “Scaramouche” (8 p.m.), “Barry Lyndon” (10:15 p.m.), “Flesh and the Devil” (1:30 a.m.) and “The Three Musketeers” (3:30 a.m.).

Earlier, the 122nd anniversary of Buster Keaton’s death is marked with a slew of his comedies with the 100-year-old “Coney Island” (6 a.m.), “The Passionate Plumber” (6:30 a.m.), “The Bell Boy” (8 a.m.), “Good Night, Nurse” (8:30 a.m.), “Sidewalks of New York” (9 a.m.), “Spite Marriage” (10:30 a.m.), “Parlor, Bedroom and Bath” (noon), “Character Studies” (1:30 p.m.), “Doughboys” (1:45 p.m.), “The Cameraman” (3:15 p.m.), “Steamboat Bill Jr.” (5:15 p.m.) and “The General” (6:30 p.m.).

In the National League wild card game, it’s Colorado at Arizona (TBS, 8 p.m.).

The hockey season begins with St. Louis at Pittsburgh (NBC Sports, 8 p.m.) and Philadelphia at San Jose (NBC Sports, 10:30 p.m.).

It’s Los Angeles at Minnesota (ESPN, 8 p.m.) in Game 5 of the WNBA Finals.

In preseason basketball, it’s Atlanta at Cleveland (NBA, 7 p.m.) and Denver vs. Lakers (NBA, 10 p.m.).

College football has Arkansas State at Georgia Southern (ESPN2, 8 p.m.).

Daytime Talk

Kelly Ripa and Ryan Seacrest: Harrison Ford, Uzo Aruba. The View: Idris Elba. The Talk: David Boreanaz. Harry Connick: America Ferrara, Valerie and Imani Francis. Steve Harvey: Carrie Ann Inaba, Kellen Lutz. Ellen DeGeneres: Oprah Winfrey, Demi Lovato. Wendy Williams: Whitney Cummings. The Real: Tanika Ray, Kyle Anfernee, Princess Love.

Late Talk

Stephen Colbert: Kerry Washington, Russell Brand, St. Vincent. Jimmy Kimmel: Robin Wright, Mark Consuls, Depeche Mode. Jimmy Fallon: Hillary Rodham Clinton, Miley Cyrus. Seth Meyers: Tina Fey, Kevin Millar, Sean Casey, Matt Goldich, Gene Hoglan. James Corden: Cheryl Hines, Mark Feuerstein. Carson Daly: Laird Hamilton, Cigarettes After Sex, Jessica Rothe. Trevor Noah: John Hodgman. Jordan Klepper: Michael Crowley. Conan O’Brien: Billy Eichner, Michael Bisping, Lukas Nelson and Promise of the Real.