Reluctant explorer Karl Pilkington visits Peru, where he is unhappy with the Amazon jungle's toilet arrangements, and fails to impress a local tribe with his hunting skills. Arming himself with oxygen, the Mancunian then sets off on a high-altitude, eight-hour trek to witness Machu Picchu, the fortress city of the ancient Incas.

• Ricky Gervais

• Warwick Davis
• Stephen Merchant
• Karl Pilkington