The White Team suffered from the strain of Selena’s Elimination vote for Hamish. With no team members left, Shannan walked out of Camp Biggest Loser. Hayley introduced the theme of the weeks: Old Dogs vs Young Pups. As the youngest member of the Over 30s females, Margie balanced out the sides as a member of the Young Pups. The trainers put their teams through their paces, with Margie sending Selena storming out of training. The teams entered The Contest arena, for a battle over three rounds: brains, endurance and skill. Lisa won the skill round and Lydia the strength, winning them the power of The Walk.