Ben Fogle gives five members of the public the chance to conquer some of the world's most extreme environments. Will a lack of fitness delay the team in their search for Inca cities in Peru? Show more

Ben Fogle gives five members of the public the chance to conquer some of the world's most extreme environments. On the way to the lost city of Choquequirao, altitude and tiredness take their toll.

Ben Fogle leads five members of the public on the trek of their lives to find the ancient Inca city of Choquequirao. Feisty mum of three Mia is still missing - should the group move off without her?

Ben Fogle leads five members of the public on the trek of their lives to find the ancient Inca city of Choquequirao. With Howard's health deteriorating, the group face a life or death decision.

Ben Fogle gives five members of the public the chance to conquer some of the world's most extreme environments. Howard's emergency rescue is aborted and time is running out for him and for the team.

Ben Fogle gives five members of the public the chance to conquer some of the world's most extreme environments. In Guyana, the trek goes through the rainforest to the Kaieteur Falls.

Ben Fogle leads a team of would-be explorers through the rainforest of Guyana in South America. On the second leg of their journey to the Kaieteur Falls, the team takes to the river in native canoes. Show more

Ben Fogle leads a team of five would-be explorers through the rainforest of Guyana in South America. On the third leg of the journey, the explorers have to swim a 200m-wide river.

Ben Fogle leads a team of would-be explorers through the rainforest of Guyana in South America. The team's attempt to negotiate some powerful rapids ends in catastrophe.

Ben Fogle leads a team of would-be explorers through the rainforest of Guyana in South America. On the fifth leg of their journey the team begin their final push for the Falls.

Ben Fogle gives would-be explorers the chance to realise their dreams of conquering some of the world's most extreme environments. He leads his team up the highest mountain in Africa - Kilimanjaro. Show more

Ben Fogle gives five would-be explorers the chance to realise their dreams of conquering some of the world's most extreme environments. The group ascend Kilimanjaro, but face a medical emergency.

Ben Fogle gives five would-be explorers the chance to realise their dreams of conquering some of the world's most extreme environments. It looks like one member of the team will have to be evacuated.

Ben Fogle leads a team of five would-be explorers in their attempt to scale Mount Kilimanjaro. They face a punishing climb and the team are feeling the effects of altitude sickness.

Ben Fogle gives five would-be explorers the chance to conquer some of the world's most extreme environments. Exhaustion and debilitating sickness spread as the team reach Kilimanjaro.

Ben Fogle leads a team of would-be explorers across the treacherous sub-zero terrain of Spitsbergen to the magnificent Temple mountain, 80 miles from the Arctic circle.

Ben Fogle leads a team of would-be explorers across sub-zero Spitsbergen in an attempt to reach Temple mountain. The group try a nine-hour cross-country ski.

Ben Fogle gives five would-be explorers the chance to conquer some of the world's most extreme environments. He leads his team across the wastes of Spitsbergen to Temple mountain.

Ben Fogle leads a team of would-be explorers across the sub-zero terrain of Spitsbergen. A blizzard forces the team to set up emergency camp. Sian's falling body temperature calls for drastic action.

Ben Fogle leads a team of would-be explorers across the treacherous sub-zero terrain of Spitsbergen. The way forward is blocked by a frozen fjord with two metres of meltwater on top.