Naked and Afraid

Two foreigners try to become the first survivalists to endure 21 days on U.S soil; rattlesnakes, unfamiliar terrain and plummeting temperatures threaten to send them back across the pond.

A tough-as-nails MMA fighter and a professional paramedic need to dig deep to attempt to survive 21 days in the brutal caiman infested jungle of Rupunini, Guyana.

A professional backpacker and an experienced hunter attempt to survive 21 days without their high-end gear in a swampy Argentine savanna teeming with mosquitoes, aggressive bees and violent subtropical storms.

Four male survivalists who tapped in previous challenges seek redemption in South Africa; humbled by their past failures, they attempt to make it to 21 days and triumph as a tribe.

A paralegal and a fishing boat captain take on 21 days in the mighty Kalahari Desert; they soon are hit with an unexpected cold front and aggressive lions and rhinos threatening their shelter.

Two men and a woman attempt to survive 21 days in the searing heat of Limpokwena, South Africa; after suffering from harsh burns and severe dehydration on Day 1, their will to endure is threatened.