It’s week three and fierce rivalries are emerging within the group. There are two birthdays to celebrate, but a Biggest Loser party wouldn't be complete without a trial and the contestants are brought face-to-face with their old enemy - food. Also in tonight’s episode, tensions run high amongst trainers and contestants alike in Last Chance Training. The gap is widening between the contestants who are giving it their all and those who are slacking. While some contestants seem distracted, the trainers' patience is beginning to wear thin..... The third challenge is a water-based assault course, ‘Splashdown’, involving beams, ropes and inflatables.