It’s not exactly the first debate, but Hillary Clinton and Donald Trump speak back to back at the same site — the U.S.S. Intrepid — addressing veterans issues in something they’re calling a “Commander-In-Chief Forum” (NBC, MSNBC, 8 p.m), moderated by Matt Lauer.
“American Gothic” (CBS, 9 p.m.) ends its first season with two episodes.
The three-part “Harley and the Davidsons” (Discovery, 9 p.m.), a motorcycle origin story, concludes. Part one reruns at 5 p.m.; part two at 7.
Mel B., the former Scary Spice, has her own scare while “Running Wild with Bear Grylls” (NBC, 10 p.m.), off the coast of Wales.
The second part of the premiere of “Queen Sugar” (OWN, 10 p.m.), which finds the three estranged adult siblings reunited to save the family farm, occurs during the series regular time slot.
A new season starts for Ellen Page and Ian Daniel’s remarkable “Gaycation” (Viceland, 10:30 p.m.), with their travels beginning in the Ukraine.
Gretchen very reluctantly goes to therapy on “You’re the Worst” (FXX, 10 p.m.), but Samira Wiley of “Orange is the New Black” is the therapist.
Elliot has a tough time trusting “Mr. Robot” (USA, 10 p.m.).
Leila make a risky move in the season three finale of “Tyrant” (FX, 10 p.m.).
“Lucia Underground” (El Rey, 8 p.m.) is back for its third season.
Duck and halibut are on the menu on “MasterChef” (Fox, 8 p.m.).
It’s all about the new NFL season on “Any Given Wednesday with Bill Simmons” (HBO, 10 p.m.).
What’s happened since 9/11? “Nova” (PBS, 9 p.m., check local listings) looks at terrorist recruiting efforts in the past 15 years.
The salute to slapstick on Turner Classic Movies concentrates on Charlie Chaplin with the 2014 documentary “The Birth of the Tramp” (8 p.m.), followed by “A Dog’s Life” (9:15 p.m.) and “The Circus” (10 p.m.). The Buster Keaton is featured in “One Week” (11:30 p.m.) and “Steamboat Bill Jr.” (midnight) before Harold Lloyd takes over in the compilation “Harold Lloyd’s World of Comedy” (1:15 a.m.) and his “Number, Please?” (3 a.m.) and “Speedy” (3:30 a.m.). The evening ends with a silent comedy short from Charley Chase, “Charley My Boy!” (5:15 a.m.).
Baseball includes St. Louis at Pittsburgh (ESPN, 7 p.m.) and Texas at Seattle (ESPN, 10 p.m.).
And the men’s and women’s quarterfinals continue in the U.S. Open (ESPN, noon; ESPN2, 7 p.m.).
Daytime Talk
Kelly Ripa: Aaron Eckhart, Ben McKenzie, Morris Chestnut. The Talk: Matthew McConaughey (rerun). Chelsea Handler: Thomas Roberts, Sheryl Underwood, S.E. Cupp, W. Kamau Bell. Ellen DeGeneres: LeBron James, Aly, Lynn and Rick Raisman, Britney Spears. Wendy Williams: Pamela Anderson (rerun). The Real: James Maslow (rerun). Meredith Vieira: Dermot Mulroney, Jill Kargman, Mario Cantone (rerun).
Late Talk
Stephen Colbert: Whoopi Goldberg, Regina Hall, Chesley “Sully” Sullenberger. Jimmy Kimmel: Dr. Phil McGraw, Pamela Adlon, Bastille. Jimmy Fallon: Michael Strahan, James Cameron, Vince Staples. Seth Meyers: Jeffrey Tambor, Hailee Steinfeld, Nate Morton. James Corden: Susan Sarandon, Adam Brody. Carson Daly: Dan Patrick, Broncho, Tika Sumpter. Tavis Smiley: Jackie Starkey, Julian Castro. Trevor Noah: Ava DuVernay. Conan O’Brien: Colin Farrell, Citron Balfe, Declan McKenna (rerun).