There are people old enough to vote this year who weren’t alive when 9/11 happened. The century changing terror attack 18 years ago today was certainly vivid to teens at the time, particularly those in the high school within sight of the Twin Towers. They reminisce about the day on “In the Shadow of the Towers: Stuyvesant High on 9/11” (HBO, 9 p.m.), a short documentary that follows one made particularly for younger people with no firsthand memory, “What Happened on September 11” (HBO Family, 6 p.m.).
One of the aspects of that day was the President flying around the country in an undisclosed location. It’s recalled in the two hour “9/11: Inside Air Force One” (History, 9 p.m.). Other documentaries marking the day include “102 Minutes that Changed America” (History, 7 p.m.) and the movie “Flight 93” (CMT, 9 p.m.)
The strong season of “Snowfall” (FX, 10 p.m.) has its third season finale.
The creatures on “Animal Babies: First Year on Earth” (PBS, 8 p.m.) approach their first birthdays in the third and final episode of the series.
John Bolton might get a final salute on “Full Frontal with Samantha Bee” (TBS, 10:30 p.m.).
On a results episode of “America’s Got Talent” (NBC, 8 p.m.), five performers move on.
A veto competition looms on “Big Brother” (CBS, 8 p.m.) where Jackson is head of household and his nominees are Tommy and Cliff.
The top four on “MasterChef” (Fox, 8 p.m.) are still in London, where they cook for Nigella Lawson.
The brief “Beverly Hills 90210” remake “BH90210” (Fox, 9 p.m.) suffered plummeting ratings since its debut and tonight will conclude its season.
A decision is required for the couples on the finale of “Married at First Sight” (Lifetime, 8:30 p.m.).
Gentle has to make a similar decision on “Marrying Millions” (Lifetime, 10 p.m.).
On “Queen Sugar” (OWN, 9 p.m.), Sam and Violet’s shared past is revealed.
Esther has a problem only Louis can solve on “Suits” (USA, 9 p.m.).
On “Pearson” (USA, 10 p.m.), Angela leads a tent city outside city hall.
The title of tonight’s episode of “South Side” (Comedy Central, 10:30 p.m.) is “Weird White Murderer.”
OneRepublic seeks a hit on the season finale of “Songland” (NBC, 9 p.m.).
Nobody shows for OG’s retirement party on “Basketball Wives” (VH1, 8 p.m.).
Remember when grownups used to tell kids there weren’t ghosts hiding in the closet? They do the opposite on “Psychic Kids” (A&E, 10 p.m.).
Thomas Middleditch, Erin Foster, Mike Colter, Lil Rel, Sara Foster and Lamorne Morris play “Hollywood Game Night” (NBC, 10 p.m.).
The 100th anniversary of United Artists studio spotlights their output from the 1940s and ‘50s all day with “Topper Returns” (8 a.m.), “The Story of G.I. Joe” (9:30 a.m.), “The Life and Death of Colonel Blimp” (11:30 a.m.), “The Westerner” (2:15 p.m.), “The Great Dictator” (4 p.m.), “Paths of Glory” (6:15 p.m.), “12 Angry Men” (8 p.m.), “Sweet Smell of Success” (9:45 p.m.), “The Night of the Hunter” (11:30 p.m.), “Marty” (1:15 a.m.) and “Around the World in 80 Days” (3 a.m.).
WNBA playoffs begin with Phoenix at Chicago (ESPN2, 8 p.m.) and Minnesota at Seattle (ESPN2, 10 p.m.).
Baseball includes Atlanta at Philadelphia (ESPN, 7 p.m.) and Cubs at San Diego (ESPN, 10 p.m.).
Basketball has U.S. vs. France (ESPN2, 7 a.m.) in the FIBA World Cup semifinals.
In women’s college volleyball, it’s Oregon at Pittsburgh (ESPNU, 8 p.m.).
Daytime Talk
Kelly Ripa and Ryan Seacrest: Jennifer Lopez, Trisha Yearwood. The View: Jennifer Lopez, Stephen King. The Talk: Paula Abdul. Ellen DeGeneres: Chrissy Teigen, Chance the Rapper. Kelly Clarkson: Jennifer Garner, Matt Iseman, Sandy Zimmerman. Wendy Williams: Sherri Shepherd (rerun). The Real: Marcus Scribner (rerun).
Late Talk
Stephen Colbert: James McAvoy, Stephen King, Vampire Weekend. Jimmy Kimmel: Sharon Osbourne, Bill Burr, Fall Out Boy. Jimmy Fallon: Kim Kardashian, Winnie Harlow, Iggy Pop. Seth Meyers: Jennifer Lopez, Michael Sheen, Mika. James Corden: Jay Dupla, Alexandra Daddario, Noah Gardenswartz. Carson Daly: Daniel Radcliffe, Snail Mail, Michael Zeger (rerun). Trevor Noah: Greta Thunberg. David Spade: Jay Leno, Natasha Leggero, Norm Macdonald. Conan O’Brien: Will Ferrell (rerun).