1) “Chicago Fire,” “Chicago Med” and “Chicago P.D.,” 8-11 p.m., NBC. It’s time for a crossover, flipping the order of the first two shows. Firefighters and paramedics rush to a Bears game, where there’s a bacteria outbreak (shown here); then a fire causes Sevaride to suspect there’s something bigger. “Med” follows the outbreak, putting an apartment complex under quarantine; Will faces a bioterrorism suspect. That sets up “P.D.” and a massive manhunt; Voight fears it’s just a wild goose chase.
2) “CMT Artists of the Year,” 8 p.m., CMT, rerunning at 9:30. Some of Nashville’s top talents are honored here. Most will also perform – Carrie Underwood, Kane Brown, Thomas Rhett and Dan + Shay, along with Ashley McBride, named “breakout artist of the year.” Also, Chrissy Metz (“This Is Us”) sings in a tribute to the fifth winner, Luke Combs. Sam Hunt and Lady Antebellum sing a tribute to Reba McEntire, now elevated to “artist of a lifetime.”
3) “It’s Always Sunny in Philadelphia,” 10 p.m., FX, rerunning at 11. “I’m surrounded by lunatics,” Dennis announces. He is, but collective lunacy is what this show does best. Now Dee courts danger … Frank invites himself to live with a stranger … and the others are just odd. It’s a funny episode, leading into “Cake” at 10:30 and 11:30. That has short bits; some have been brilliant (Samantha Jayne’s “Quarter Life Poetry), some good-but-inconsistent (“Oh Jerome, No”) and some sputtering.
4) “Nancy Drew,” 9 p.m., CW. One guy sums it up: “You’re not a kid. This girl-detective thing isn’t cute anymore.” The original tales had a teen solving mysteries. Now Nancy is a high school grad, a waitress and (oddly) a murder suspect; her deeds – breaking-and-entering, spying on colleagues – are more absurd than charming. Still, this series is skillfully acted and filmed; as the story slowly unfolds, this hour takes us to an end-of-summer festival.
5) “Stumptown,” 10 p.m., ABC. While police search for an escaped prisoner, Dex has a bigger task: Battling another private-eye (Donal Logue), she’s trying to take down a real-estate mogul.