NBC announced today the premieres of three new and returning reality series in January, including the series debut of NBC's updated version of "American Gladiators" with a two-hour edition on Sunday, January 6 (9-11 p.m. ET) -- before the competition series moves to its regular day-and-time on Monday, January 7 (8-9 p.m. ET) -- as well as the fifth-season premiere of "The Biggest Loser" on Tuesday, January 1 (8-10 p.m. ET) and the return of the competition series "1 vs. 100" on Friday, January 4 (8-9 p.m. ET). These series join the previously announced premiere of "The Celebrity Apprentice" on January 3 (9-10 p.m. ET).

Hulk Hogan and Laila Ali are the hosts of "American Gladiators," the iconic event/competition show which returns with a fresh modern reinvention for the 21st century. Using splashy twists including special effects, water skills and the latest technology, the classic games will be upgraded with even higher thrills, impact, energy and spectacle!

The fifth cycle of "The Biggest Loser" will feature an all-new twist that will heighten the emotion and tension in the competition. For the first time ever in the history of the show, the excitement will double - it's couples! Teams of two will compete against each other rather than individuals. These teams -- including a mother and son, husband and wife, a divorced couple, best friends and brothers -- already have a special bond so they're playing not only for themselves, but also for their loved one.

Season two of NBC's popular game show "1 vs 100," hosted by comedian Bob Saget, will kick-off with its biggest game yet -- a themed "Battle of the Sexes" episode - where one women will compete against 100 men and one man vs. 100 women to determine who's the smarter sex? In this exciting premiere episode, one person will win the top prize of $1 million dollars for the first time in the show's NBC history.