(NBC NEWS) -- "The Biggest Loser" returns to NBC this Sunday with a special two hour premiere that features a mix of old and new.
Trainer Jillian Michaels returns to the Biggest Loser ranch.
The hard-nosed trainer took a break from the show to become a parent.
That's given her an even greater appreciation for this season's twist: Incorporating
three overweight teens.
The teens won't be traditional competitors.
There will be no weigh-ins for them and no eliminations.
The emphasis is on educating the kids and those around them.
"The Biggest Loser" has its season premiere Sunday night at 9, before moving
Into its new home Mondays at 8 the next night.