A self-proclaimed 'king of the forest' and an endurance athlete tackle the backwoods of Alabama. They secure shelter and a fire early on, but when hunger kicks in, one of them does something that's never been seen in show history.

A marine biologist and a special forces veteran risk hypothermia at every turn as they take on Ontario, Canada, with no clothes. Bitter cold, torrential rain and wandering bears and moose make every night a struggle.

A horse trainer and a wilderness instructor take on the rain-soaked jungle of Colombia's Amazonia. Constant downpours and a lack of resources make one survivalist hit rock bottom, and the other is forced to pick up the slack.

Two survivalists team up to tackle the swampy shore of Croatia. A strong partnership is forged through braving the elements and facing their demons, but everything takes a turn for the worst after a freak accident.

An elite endurance athlete and a stay-at-home dad team up to take on the rugged Belize jungle. Jaguars, venomous snakes, falling trees and powerful storms threaten their evolving partnership.

A stay-at-home mom and a trucker try to survive in a Philippine forest after a typhoon scatters debris everywhere. Combating sickness and no food, they come together and ward off hunger by eating a skunk.

A special ops veteran teams up with a single mom to fight torrential rains, flash floods and sickness in Thailand's Sai Rung River Valley. The pair puts their skills to the test before the river leaves them stranded from the crew.

A resilient mom from Washington and a quirky spider-lover tackle the remote Seminole Forest of Florida. Terrorized by huge gators and 550-pound black bears, they are driven to their physical and emotional breaking points.

An adventure guide and a veteran take on Australia's Outback and face brutal terrain, freezing temperatures and lack of sleep. However, their greatest danger may be each other when cultural differences cause tempers to flare.

Survivalists take on the arid lakebeds of Nicaragua. The cutthroat environment features venomous snakes and deadly caiman, but when one of them fails to pull their weight, it becomes clear their worst enemy could be each other.

An inexperienced survivalist and a wilderness enthusiast take on the unforgiving savanna of Namibia. The harsh conditions quickly take a toll, and the challenge is further complicated when a competitor returns for redemption.