Korina Emmerich, Amanda Valentine and Tim Gunn discuss the sixth challenge. (Barbara Nitke/Lifetime)

“NFL Preseason Football” bumps into ABC and NBC’s prime-time slots with the Washington Redskins in Tampa to play the Buccaneers (NBC at 7:30 p.m.) and the Baltimore Ravens in New Orleans to play the Saints (ABC at 8).

The documentary “Good Morning, Mission Hill: The Freedom to Teach, The Freedom to Learn” (WHUT at 8) gives us an intimate look at a successful urban school in Boston that is organized with mutual respect and flexibility in mind and where teachers have control over the curriculum and day-to-day routines.

The clothiers on “Project Runway” (Lifetime at 9) are challenged to create unconventional wedding dresses. Dita Von Teese and fashion blogger Chiara Ferragni are guest judges.

“Doomsday Preppers” (Nat Geo at 9) introduces us to a family that has spent millions of dollars to equip their home with the most high-tech security products available to the public.

Jen and Troi train their kids to be warriors with rigorous martial arts classes on “Extreme Guide to Parenting” (Bravo at 9:30), yet their oldest daughter’s desire to also pursue dance causes friction.

While in captivity, Atika and Nessa learn of a secret that will bond them forever, and an academic uncovers a trail of corruption on “The Honorable Woman” (Sundance at 10).

Alton Brown and Daphne Oz weigh in on who will battle Bobby Flay as they observe chefs from New Jersey and Los Angeles on “Beat Bobby Flay” (Food at 10).

AJ and Lina try to push Russ toward a shady real estate deal on “Married” (FX at 10).

It’s Riki and Kate’s 1,000th show, and to celebrate, they’ve got to deal with a heckler and a calculator magician on “Garfunkel and Oates” (IFC at 10).

Emotionally guarded Jimmy lets Gretchen in on his feelings, and that freaks her out on “You’re the Worst” (FX at 10:30).

A repeat “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35) hosts actors Halle Berry and Chris Colfer, with musical guest Florida Georgia Line.

Actor Mike Myers comes to the “Late Show With David Letterman” (CBS at 11:35), along with singer-songwriter John Fullbright.

Emmy Award-winning actor Aaron Paul is on “Jimmy Kimmel Live” (ABC at 11:35), with MTV Video Music Award-winning musician Ed Sheeran.

Rachel Lubitz