This week, Dr. Huizenga delivers the sobering news that this season of contestants is the most unhealthy ever on the show, and more at risk for catastrophic diseases than any previous cast. To illustrate his point, he gives each team a medical task that proves to be a real eye-opener as to what their poor health is really costing them, and how important it is to make healthy changes in their lives. Later, a balance challenge over a pool offers the best prize of all for the winning team, but an unexpected event affects the ending of the competition. Later, trainer Jillian Michaels tries to get one contestant to face one of her biggest fears, and then an elimination after weigh-in sends another contestant packing.