Gabrielle Balassone

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.

Facing an unprecedented two-day extraction, the final eight survivalists hunt, fish, and trap potential food. An emergency overnight in the jungle causes fears and tensions to flare. Malorie's struggles may cause medics to step in and end her challenge.

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.

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.