Ben Fogle brings back four of the toughest explorers from this series' expeditions to help him fufil his childhood dream: to climb Mount Roraima in Venezuela, the setting for the novel the Lost World. The team navigate their way across the savannah. Jonna strays off course to avoid deadly snakes. Tempers flare as the team battle to control dug out canoes on a storm-lashed jungle river. London cabbie, Daren, leads them straight into the heart of a treacherous bog.