Max Djenohan

Stripped down and stranded, Naked and Afraid veterans return for the most isolating challenge yet. With no tribe, partner or help of any kind, mental toughness plays a key role in making it through this 21-day survival challenge alone.

A group of the best survival experts in the world take on an un-survivable situation: 40 days. 40 nights. No food, water or clothes. To survive they'll need to master the environment, pushing far beyond the breaking point. Will even one be able to finish?

Winner takes all as 12 all-star Naked and Afraid survivalists battle to take home $100,000 and be crowned the Last One Standing in a head-to-head, multiphase challenge.

What happens when you put two complete strangers - sans clothes - in some of the most extreme environments on Earth? Each male-female duo is left with no food, no water, no clothes, and only one survival item each as they attempt to survive on their own.