"The Biggest Loser" kicks off season 12 with two new trainers -- renowned tennis star and certified trainer Anna Kournikova and fitness expert Dolvett Quince -- joining "Biggest Loser" veteran Bob Harper. Under their supervision, 15 contestants come together hoping to transform their bodies, their health and ultimately, their lives.
Fan favorites return for a thanksgiving special featuring never-before-seen footage, hilarious bloopers and a surprise announcement.
Trainers Anna Kournikova and Dolvett Quince join Bob and new contestants for the Battle of the Ages!
Tempting donuts, limited time in the gym and a visit from Dr. H.
NFL Week, with Clay Matthews, Tony Gonzalez, Drew Brees, Eric Dickerson, Shawne Merriman and Tim Tebow!
Fan faves Hannah Curlee, Adam Hurtado and Marci Crozier check in, and the teams battle the elements to win letters from home.
One lucky player goes home with their trainer and immunity - and the responsibility of losing enough weight to keep their team safe.
Halloween Week brings a crazy candy temptation, a haunted maze and a secret revealed!
A high-stakes calorie challenge realigns the teams and causes a whole lot of drama on the ranch.
Season 11 winner Olivia Ward and chef Devin Alexander host a cooking challenge!
Apolo Ohno guest stars as the game flips to singles and the contestants compete in a pentathlon for immunity!
After a holiday temptation challenge, the trainers prepare a healthy Thanksgiving feast!
It's makeover week with celebrity stylists Jeannie Mae and Ken Paves - and the Final Four are announced!
This week's marathon winner will guarantee themselves a place in the Final Three - and win $25,000.
The Final Three vie for The Biggest Loser crown! Also featuring a live performance by Train and a sneak peek at Season 13.