Avsnitt 4

Challenge for each team to build a raft that can carry two team members out of scrap. Then race the rafts up and down a white water course trying to avoiding rocks and not capsize. The team that completes the course in fastest time wins and advances to the next round. They have 3 laps to get the fastest time. Contestants Team Red The Dukes of Spook Team captain Dave Smith, Laura Frenchy, Expert Chuck Ratley . Team Blue Nasa's Rocket Men Team captain Mike Jim Tom Expert Doug Riddle