“The Four” (8 p.m., Fox): This week, a new set of determined challengers face-off

“The Four” (8 p.m., Fox): This week, a new set of determined challengers face-off against the four in front of a panel of industry experts: Sean “Diddy” Combs, DJ Khaled, and Meghan Trainor.

“Nashville” (9 p.m., CMT): Avery’s dilemma deepens now that Juliette is back in town. The end is just two weeks away for this country music soap opera.

“Beat Bobby Flay” (10 p.m., Food): A new season begins, with a fresh roster of chefs lining up to see if they can outdo the culinary icon.

TV listings, D3