The ninth season of "The Biggest Loser" premieres at 8 p.m. tonight on NBC.
The two-hour show will introduce viewers to the contestants competing on the new season. It's "The Biggest Loser: Couples," so the series will focus on 22 contestants -- 11 family teams of two.
As usual, producers are billing this season as "the heaviest cast ever." Competitors include a 526-pound contestant and twin brothers who together weigh close to 1,000 pounds.