Two naked survivalists are challenged to survive for 21 days in the Costa Rican rainforest, despite a deadly snake bite on a producer. Kim is paired with Shane. They encounter challenges including rain, illness, shelter fire, and a snake attack.

Two survivalists take on the African Serengeti to survive for 21 days with no food, water or clothes. EJ Snyder and Kellie Nightlinger must put their skills to the ultimate test: to overcome the tough terrain and the predator-filled environment.

Two survivalists Jonathan Klay and Alison Teal are marooned on a Maldivian island for 21 days. The surfer girl and the former Marine clash when sunstroke and starvation threaten their survival as they try to get through 21 days naked and afraid.

Clint Jivoin and Laura Zerra are Naked and Afraid on a Panamanian island for 21 days. Plagued by sand flies and threatened by snakes and crocodiles the pair have to stick together using all their skills and experience to survive in the tropical hell.

Puma Cabra and Julie Wright have to survive in Sabah, Borneo for 21 days. The jungle is their unrelenting foe as they battle with sickness, starvation and the deadly wildlife testing their resolve and determination every step of the way.

Billy Berger and Ky Furneaux are dropped in it up to their necks as they have to survive 21 days in the Louisiana swamp. They are washed out of their shelter by storms and have to tackle deadly snakes at every moment while avoiding the hungry alligators.