This week is all about teamwork as the eight remaining contestants must work together to lose at least 50 pounds collectively so everyone can remain at the ranch for another week. If they don't reach that goal, someone will be going home. A sand pile challenge that requires a big team effort gives the players the opportunity to win a substantial weigh-in advantage. Later, while hiking with their trainers, the contestants take time to celebrate their accomplishments and vocalize their intentions as they move forward on their weight loss journeys. Meanwhile, at Comeback Canyon, two fierce competitors vie for the chance to stay one more week with trainer Bob Harper. One competitor from Comeback Canyon is ultimately sent home, while the ranch scale reveals whether the eight contestants there are safe for another week.

Host Alison Sweeney surprises the contestants with the news that this week they'll be competing as singles, rather than as teams. In their first challenge as singles, the players must cross an obstacle course, including a mud pit, and complete a memory puzzle at the end for the greatest prize of all at the ranch - immunity. Then trainers surprise the final seven contestants with heartwarming videos of support from players, coaches and family members back home, fueling their fire to keep working hard at the ranch. Later, after a fiercely competitive week at Comeback Canyon, trainer Bob Harper sends one player home for good, while the ranch weigh-in results in a tearful elimination as the contestants vote to send another player packing.

In the first of two special Hawaii episodes, the remaining six contestants are off on the adventure of a lifetime to the breathtaking island of Kauai. There they'll continue the competition and do everything they can to avoid falling below this week's red line. They start their trip at the scenic Waimea Canyon State Park before the trainers put them through an intense workout at Polihale beach. Then, in a Hawaii-style challenge, they all hop into kayaks and paddle out in the ocean to retrieve a bag of puzzle pieces. The finished puzzle reveals the prize for the winner - an incredible, private helicopter tour of Kauai. Later, one trainer and a contestant face their fears together about the open water and try snorkeling, before all the contestants arrive at the beach weigh-in in outrigger canoes to determine who is going home - and who gets to stay in paradise for another week!