(All times Eastern).
The Flash (CW at 8) The show teams up with “Supergirl” for a musical crossover that finds Barry and Kara without their powers. The episode also reunites Melissa Benoist with her former “Glee” co-star Darren Criss.
New Girl (Fox at 8) Jess avoids her feelings for Nick by visiting her dad (guest star Rob Reiner) in Portland, Ore.
Outsiders (WGN America at 9) The fight between the Farrells and the coal company takes a tragic turn.
Switched at Birth (Freeform at 9) In the show’s 100th episode, Bay and Daphne meet a mysterious woman who reminds them of their late father, Angelo.
Being Mary Jane (BET at 10) In the season finale, MJ tries to get closer to the anchor chair, with Justin acting as her unlikely ally.
Cosplay Melee (Syfy at 10) Yvette Nicole Brown (“Community”) hosts this competition series in which cosplay enthusiasts strive to create intricate costumes. The winner will walk away with $10,000.
Parched (National Geographic at 9) Academy Award-winning director Alex Gibney narrates this three-part series about our increasingly global water crisis.
Upscale With Prentice Penny (Tru at 10) The showrunner of HBO’s “Insecure” shares his secrets to a life of luxury — on any budget.
If Loving You Is Wrong (OWN at 9) Season 4.
Chopped (Food at 10) Season 33.
Conan (TBS at 11) Reese Witherspoon, Nick Swardson.
Daily Show (Comedy Central at 11) Dahlia Lithwick.
Fallon (NBC at 11:34) Jessica Chastain, Joe Manganiello, Gary Clark Jr.
Colbert (CBS at 11:35) Ryan Reynolds, Josh Lucas, Andy Daly, Green Day.
Kimmel (ABC at 11:35) Dave Chappelle, Naomi Scott, Weezer.
Corden (CBS at 12:37) Allison Williams, Darren Criss
Meyers (NBC at 12:37) Dax Shepard, Hannah Simone, Hey Violet.