Torrential downpours hammer the survivalists as soon as they're dropped into the Georgia rainforest. Pushed by the weather, mountain lions, black bears and poisonous copperheads, the pair create a bond that leads to a life-changing decision.

The mile high altitude of Colorado's San Juan Mountains tests two strangers ability to adapt and survive. Black bears are not only a predator threat but compete for limited resources. Storms roll in, bringing hailstorms and hypothermic conditions.

The frigid Montana wilderness pushes the survivalists' partnership over the edge. As they struggle to work together, wildlife including bears and aggressive moose circle their camp. Plummeting temperatures create the need for drastic action.

Upon completing his 14-day Fan Challenge, Dan, a biologist from Hawaii, attempts 21 days in a complete foreign landscape, the blistering Chihuahua Desert. Paired with a leathersmith, he takes on rattlesnakes, stinging fire ants and bone-chilling nights.

All-Star survivalists Wes and Suzanne take on Ecuador's relentless rainforest. Aggressive pumas, venomous snakes and constant storms make every step dangerous. Even these veterans are not prepared for the shocking news that shakes their challenge.

After surviving a nearly fatal car crash, an impulsive adventurer is paired with a cautious archaeologist in the Texas desert. Stalked by mountain lions and tarantulas, this odd couple must work together to endure scorching days and frigid nights.

When nature calls, a fan's risky survival strategy backfires and endangers the challenge in the Arizona desert; an Eagle Scout and a stay-at-home mom struggle to survive among rattlesnakes and mountain lions while overcoming their own mistakes.

An Australian bushman and an American biologist form an intimate bond as they take on the Namibian desert together. The relationship grows as they search for scarce food along a thin stretch of raging river whole territorial baboons track them at every turn.

Four survivalists - a pair who are pushing 50 and a pair in their early 20's - are dropped into the Sonoran Desert. Tested by mountain lions, gila monsters, and unrelenting heat, does experience bring wisdom or will youth be severed?

Surrounded by crocodiles, leopards and venomous snakes, survivalist band together against the South African bush. But scorpion and aggressive tick - in the most vulnerable parts of the body - put their challenge at risk.

Florida's brutal black water swamp pushes a hard-headed homesteader and an elite military Alpha male to their limits. Threatened by venomous snakes, dangerous wild boar and torrential rains, the clashing survivalist must work together or fail alone.