(All times Eastern.)
The Middle (ABC at 8) Mike asks Sue to plan a celebration for his and Frankie's 25th wedding anniversary.
Finding Your Roots (WETA and MPT at 8) Scarlett Johansson, Paul Rudd and John Turturro learn about their immigrant ancestors.
This Is Us (NBC at 9) The tear-jerker drama flashes back to a Halloween that changed everything for the big three.
The Mayor (ABC at 9:30) Courtney struggles to reach a deal with the transit union amid a strike.
Leah Remini: Scientology and the Aftermath (A&E at 10) The actress sits down with two of her longtime friends to discuss the effects Scientology had on their childhoods.
Law & Order True Crime: The Menendez Murders (NBC at 10) Lyle and Erik Menendez take the stand in the latest installment of this eight-part miniseries.
Drop the Mic (TBS at 10:30) "Dawson's Creek" alum James Van Der Beek battles "Fresh Off the Boat" star Randall Park. New England Patriots tight end Rob Gronkowski goes up against "Jane the Virgin's" Gina Rodriguez.
Zumbo's Just Desserts (Netflix streaming) The streaming giant brings this popular Australian baking series stateside.
Judah Friedlander: America Is the Greatest Country in the United States (Netflix streaming) The comedian tackles a wide range of politically charged issues in this stand-up special.
Major Crimes (TNT at 9) Season 6.
Conan (TBS at 11) JB Smoove, Whitney Cummings, Joel Kim Booster.
Daily Show (Comedy Central at 11) Gretchen Carlson.
Fallon (NBC at 11:34) Millie Bobby Brown, Kelly Clarkson.
Colbert (CBS at 11:35) Mark Ruffalo, Chris Matthews, Gilbert Gottfried.
Kimmel (ABC at 11:35) Kristen Bell, Dave Grohl, Alice Cooper.
Corden (CBS at 12:37) Allison Janney, Nancy Pelosi, Laurence Fishburne, Iliza Shlesinger.
Meyers (NBC at 12:37) Anthony Bourdain, Aya Cash, Todd Barry.