Tonight is week four of The Biggest Loser on USA Network. We open with Erica being upset about Dom leaving and that she failed him as a trainer. The winning team gets ellipticals from Planet Fitness and a 3 pound advantage at the weigh in. The red team dominates the challenge and it worries the blue team, who have been winning every challenge since week one. She discusses how her mom put her on a diet and how it was embarrassing when she was in school.