S15, E10: The 10 remaining contestants reach a milestone this week, as the competition goes from teams to singles. Wearing their new individual color shirts, the players meet host Alison Sweeney for a night-time "ring of fire" endurance challenge that involves holding a percentage of their individual weights. Alison also shares exciting news about an upcoming event that will be a "Biggest Loser" first for contestants, and sobering news that this week's weigh-in will end with a double elimination. Now that the teams have been disbanded, trainers Bob, Jillian and Dolvett are eager to switch it up and work out with new contestants this week. One player struggles with self-sabotaging negative thoughts, and two contestants make it to the coveted "One-derland" at weigh-in and say goodbye to weighing over 200 pounds. Then it’s time for the dreaded red line, which will determine which two players will be going home.