Supervivencia al desnudo: edición extrema

Twelve brave souls take on their first XL challenge in the Colombian Badlands. Survivalists must battle disease-carrying insects, scorching heat, six-foot caiman and stalking jaguars. In this unprecedented challenge, they must trek 40 miles in 40 days.

Adam, Heather and Sam score a massive protein win, but the trek through Colombia's badlands puts the team at risk. Chris battles a mystery illness. As tension rises, Nathan reveals a secret to his partners. The Proving Grounds send a survivalist home.

Sam gets a tick bite in the worst spot imaginable. When Terra encourages Lynsey to quit, emotions erupt. Desperate for protection, Adam and Heather start a grueling shelter rebuild. Malorie stalks a massive caiman. The Badlands send a survivalist home.

A newly formed tribe quickly works together to stalk and kill a caiman. The pressure to trek 40 miles to extraction pushes two teams to make risky migrations. A survivalist is on the brink when medics discover parasites in their digestive system.

A massive food win buoys Terra and their whole team. On the heels of a caiman kill, Malorie sets her sights on a bigger prize. Heather is shocked when Adam tells her he has not been sharing food. A scorching migration could end Heather's challenge.

Far from extraction, Kaiela leads her team on a punishing trek that puts her challenge at risk. Adam and Heather's smoldering tension makes the new camp choose sides. Desperate for protein, a risky survival choice pushes Heather to her breaking point.

The remaining survivalists join forces. When the group splinters to hunt resources, it leads to a big protein win but creates tension between Lynsey and Terra. Nathan uses a primitive cooking method to maximize the meat. Adam and Heather clear the air.

A fresh crop of survivalists takes on their first XL challenge in Colombia's Badlands, an area teeming with disease-carrying insects, venomous snakes, stalking jaguars and six-foot caimans. For the first time, survivalists must trek 40 miles in 40 days.