The contestants compete in two challenges this week to gain pound advantages at the weigh-in. The first challenge tests their nutrition knowledge, with their trainers consuming food for each incorrect answer. The "Wall of Glory" is revealed in the gym, showing contestants when they were top athletes, inspiring them to work ever harder in the gym. Then trainers Dolvett Quince, Jessie Pavelka and Jennifer Widerstrom help out at an endurance challenge before a weigh-in determines who will be headed to the surprise "Comeback Canyon" location with trainer Bob Harper and which of Bob's two eliminated contestants will be headed home.

All athletes dread the thought of being benched or sidelined from a game, and this week's challenge gives the winning team the power to sideline one player from an opposing team so their weight won't count at the weigh in. And the challenge comes with high anxiety as the players are suspended in the air racing to cross a canyon and put together a puzzle when they're done. Everyone has to step it up this week to avoid the dreaded red line elimination, because they won't know which player is chosen to sit out until they get to the scale. After the weigh-in, the eliminated player is thrilled to learn they have a second chance at Comeback Canyon, while the eliminated contestant at Comeback Canyon heads home for good..