ArianaGrandeJustin Bieber, Charlie Puth, Ariana Grande (pictured), Diplo, the Chainsmokers, Meghan Trainor, Ellie Goulding, Lucas Graham, Fifth Harmony, Dya, Niall Horan and DNCE all perform in the annual “iHeartRadio Jingle Ball Tour” (The CW, 8 p.m.), recorded this week at New York’s Madison Square Garden.

What looked like curtains on network TV flickers to life on cable as “Nashville” (CMT, MTV, 9 p.m.; VH1, 10 p.m.) moves into its fifth season right where they left off, with Juliette’s plane going down.

Thursday Night Football has Los Angeles at Seattle (NBC, 8:20 p.m.).

Part one of the 15th season finale of “Project Runway” (Lifetime, 9 p.m.) begins with Michael Kors returning as guest judge. Tim Gunn goes to visit th hometowns of the final four designers — two in Los Angeles, Laurence Base and Rik Villa, as well as Erin Robertson in  Cambridge, Mass., and Robert Parra of Miami.

It’s followed by the first season finale for its spinoff, “Project Runway: Fashion Startup” (Lifetime, 10:30 p.m.).

“The Great American Baking Show” (ABC, 9 p.m.) bakes meringue pie and tarts.

It comes after a double play of the animated holiday specials “Disney Prep & Landing” (ABC, 8 p.m.) and “Prep & Landing: Naughty vs. Nice” (ABC, 8:30 p.m.).

The Wolowitz baby arrives on “The Big Bang Theory” (CBS, 8 p.m.).

Jack dates a co-worker on “The Great Indoors” (CBS, 8:30 p.m.).

Colleen shops for a wedding dress on “Life in Pieces” (CBS, 9:30 p.m.).

“State of Play” (HBO, 8 p.m.) looks at the Palestine national football team.

Nine survivalists go deep into Patagonia on “Alone” (History, 9 p.m.), and one suffers a serious injury.

Christmas movies tonight include “The Santa Clause” (Freeform, 7 p.m.), “Four Christmases” (AMC, 8 and 10 p.m.), “A December Bride” (Hallmark, 8 p.m.), “Love Actually” (Oxygen, 8 and 11 p.m.),  “Tyler Perry’s A Madea Christmas” (USA, 8 p.m.), “The Search for Santa Paws” (Freeform, 9 p.m.) and “Love You Like Christmas” (Hallmark, 10 p.m.).

Holiday films on Turner Classic Movies include “The Shop Around the Corner” (8 p.m.), “Christmas in Connecticut” (10 p.m.), “Love Finds Andy Hardy” (midnight), “Desk Set” (1:45 a.m.) and “Period of Adjustment” (3:45 a.m.).

NBA action includes Chicago at Milwaukee (TNT, 8 p.m.) and New York at Golden State (TNT, 10:30 p.m.).

Men’s college hoops include Appalachian State at North Carolina State (ESPNU, 7 p.m.).

Women’s games include DePaul at Temple (ESPNU, 9 p.m.).

Soccer includes a FIFA Club World Cup semifinal of Real Madrid vs. Club America (Fox Sports 1, 5:30 a.m.).

In the NCAA women’s college volleyball championship semifinals, it’s Stanford vs. Minnesota (ESPN, 7 p.m.) and Texas vs. Nebraska (ESPN, 9:30 p.m.).

Daytime Talk

Kelly Ripa: Arnold Schwarzenegger, Elle Fanning, Van Jones. The Talk: Cedric the Entertainer, Alan Tudyk, Carnie Wilson. Chelsea Handler: Lauren Graham, Maren Morris, Common. Harry Connick: Chris “50 Cent” Jackson, Alfonso Herrera. Ellen DeGeneres: Rosemarie DeWitt, Alicia Keys. Wendy Williams: Martha Stewart, Vikki Ziegler. The Real: Jovan Adepo.

Late Talk

Stephen Colbert: James Franco, Michael Stipe, Gad Elmaleh. Jimmy Kimmel: Blake Shelton, Andrea Riseborough. Jimmy Fallon: Casey Affleck, Sienna Miller, Solange. Seth Meyers: Mariah Carey, Colin Quinn, Megadeth, Dave Lombardo. James Corden: Katie Holmes, Seth MacFarlane. Carson Daly: Gareth Edwards, Classixx, Alexa Davalos. Trevor Noah: Rob Corddry. Conan O’Brien: Diego Luna, Billy Eichner, the Pretenders.