It'?s Super Bowl week on the Biggest Loser ranch, and that means food, football and fun with two special guest stars ? celebrity chef Curtis Stone and NFL MVP Kurt Warner. First, Stone tests the contestants? calorie knowledge of traditional Super Bowl snacks, then teaches them how to make healthier versions. Later, one contestant has to leave the ranch for a very important arrival at home, while another surprises her teammates with a new change in attitude. Then it'?s time for the challenge, when Warner puts the contestants through an NFL-style drill that will give the winner an especially valuable prize this week. Then the partners who were sent home for 30 days while their teammates stayed on the ranch are welcomed back. But the reunion celebration is quickly followed by a tense weigh-in and elimination that will leave one team heading home. Alison Sweeney hosts, and trainers Bob Harper and Jillian Michaels also star.