The challenge draws to a conclusion for the teams of castaways who come from opposite ends of the economic and social scales. As they face their last week of isolation, the two camps decide to settle their class issues and battle the high seas in a joint bid to get to the neighbouring island on a raft. But can they bury their differences before Bear arrives? Steelworker Ben finds a new lease of life to finally build the shelter of his dreams - but disaster stops him in his tracks at the 11th hour.