Kimmy2A beloved online comedy returns with an irresistible gimmick. The special “Unbreakable Kimmy Schmidt: Kimmy vs. the Reverend” (Netflix, streaming) is the first comedy to employ the choose-your-adventure technology used in the “Black Mirror” episode “Bandersnatch” (and to skip the intros to most Netflix series). So it’s up to viewers to navigate what’s to happen to the characters played by Ellie Kemper, Tituss Burgess, Daniel Radcliffe and Jon Hamm. Viewers also presumably have time these days to go back and try just about every possibility.

As new programming for networks begins to dry up, they increasingly  look to the past. Tonight, in “The Happy Days of Garry Marshall” (ABC, 8 p.m.), they celebrate the creator of “Happy Days,” “Laverne & Shirley,” “Mork & Mindy” not to mention “Pretty Woman” and “The Princess Diaries.” Friends line up with their testimonials.

In the concluding chapters of “Asian Americans” (PBS, 8 p.m., check local listings) go through the Cold War and into the modern era (but probably not the anti-Chinese slurs at the White House Monday).

On “The Last O.G.” (TBS, 10:30 p.m.), Shay finally gets a break in her career.

A two hour “Gordon Ramsay’s 24 Hours to Hell and Back” (Fox, 8 p.m.) tries to help three businesses ravaged by floods in Elliott City, Md., in 2016 and 2018.

The British children’s cooking show “Step Up to the Plate” (BYU tv, 8:30 p.m.) makes its stateside debut. It’s followed by Jeff Rogers low-budget “Jeff’s Homemade Game Show” (BYU tv, 9 p.m.).

But it’s not like there’s a shortage of game shows. In addition to “Ellen’s Game of Games” (NBC, 9 p.m.) there’s a social distancing edition of “Hollywood Game Night” (NBC, 10 p.m.). Isn’t time ripe for a Zoom call of “Hollywood Squares”?

“DC’s Legends of Tomorrow” (CW, 9 p.m.) goes back to college.

Season finales come for “The Flash” (CW, 8 p.m.) and “For Life” (ABC, 10 p.m.).

Results are revealed on “The Voice” (NBC, 8 p.m.).

“Ghost Adventures” (Travel, 8 p.m.) goes to Transylvania but should be more afraid of traveling in general.

Three winners of “Chopped” (Food, 9 p.m.) return to challenge judge Maneet Chauhan.

“Little People, Big World” (TLC, 9 p.m.) gets ready for the baby’s arrival.

There’s a trip to San Francisco for the “7 Little Johnstons” (TLC, 10 p.m.).

The team begins to dig for “The Secret of Skinwalker Ranch” (History 10 p.m.).

Turner Classic Movies salutes female activists and humanitarians tonight with “The Miracle Worker” (8 p.m.), “A World Apart” (10 p.m.), “Blossoms in the Dust” (midnight), “Marie: A True Story” (2 a.m.) and “An Angel at My Table” (4 a.m.). Earlier are the films of Katharine Hepburn, born this day in 1907, with “Spitfire” (6 a.m.), “Break of Hearts” (7:30 a.m.), “Undercurrent” (9 a.m.), “Keeper of the Flame” (11 a.m.), “Sylvia Scarlett” (12:45 p.m.), “Alice Adams” (2:30 p.m.), “Pat and Mike” (4:15 p.m.) and “Woman of the Year” (6 p.m.).

Daytime Talk

Kelly Ripa and Ryan Seacrest: Michelle Dockery, Lance Ulanoff. The View: Sen. Tammy Duckworth, Magic Johnson. The Talk: Martina McBride, Audra McDonald. Ellen DeGeneres: Kristen Bell. Kelly Clarkson: Alison Brie, Ella Jay Basco, Kid Ace (rerun). Wendy Williams: Deon Cole. The Real: Vanessa Williams, Brie & Nikki Bella.

Late Talk

Stephen Colbert: Christine Baranski, Ellie Kemper. Jimmy Kimmel: Lionel Richie. Jimmy Fallon: Ethan Hawke, Elle Fanning, Kane Brown. Seth Meyers: Paul Giamatti, Nicole Richie. James Corden: Jeff Goldblum, James Blake. Lilly Singh: Beth Behrs, Tichina Arnold (rerun). Conan O’Brien: Chris Gethard.