The Biggest Loser 8 p.m., NBC
What ever happened to Ruben Studdard, the guy who won the second season of “American Idol”? Well, he didn’t lose weight, and he didn’t lose weight some more. And now the guy known as “The Velvet Teddy Bear” is a contestant on this weight-loss reality show. He’s the only “celebrity” contestant, and he’s the heaviest of the group this season, with a starting weight of 462 pounds.
Superheroes: A Never-Ending Battle 8 p.m., Channel 2
This PBS documentary chronicles the history of superheroes, from their emergence in the 1930s to their role as today’s box office champions. Hosted by Liev Schreiber, the film includes interviews with comic-book mastermind Stan Lee, actors Adam West and Lynda Carter, author Michael Chabon, and cartoonist-author Jules Feiffer. Pictured: Christopher Reeve as Superman.
New Girl 9 p.m., Fox
Schmidt just wants to be loved, is that so wrong?
Chicago Fire 10 p.m., NBC
There’s a mole. And we’re not talkin’ dermatology. Or Mexican.
Criss Angel BeLIEve 10 p.m., Spike
More likely to watch “BeLIEVe Schreiber.”Matthew Gilbert can be reached at firstname.lastname@example.org. Follow him on Twitter @MatthewGilbert.