After revisiting the hospital to check in on their progress, the remaining players face off in one of the biggest challenges in Biggest Loser history -- they must fly across a ravine on zip-lines and collect flags. One player gets the chance to give immunity to himself or one of his teammates, and his decision ultimately affects his own fate. And a shocking announcement at the weigh-in changes the way the rest of the game will be played.

After working so hard to lose weight for 12 weeks, the remaining seven contestants get treated to the ultimate day of pampering with makeovers for all. First, they're joined by legendary fashion maven Tim Gunn, who helps each of them choose a stylish outfit at Macy's that flatters their new, skinnier selves. Next they're treated to eye-catching new hairstyles so they'll be looking their best at a runway fashion show that will be photographed for the May issue of Prevention Magazine. Then the contestants strut their stuff - with new clothes and new "dos" - down a fashion show runway, unaware that loved ones are waiting to surprise each one in emotional, heartwarming reunions.