1. Enter the Proving Grounds

Twelve brave souls take on their first XL challenge in the Colombian Badlands. In this unprecedented challenge, they must trek 40 miles in 40 days.

2. The Badlands Bite Back

A risky hunt scores a big win. Nathan reveals a secret to his partners. Chris wrestles with an unknown illness. The Badlands send a survivalist home.

3. Ticking and Screaming

Sam gets a tick bite in the worst spot imaginable. When Terra encourages Lynsey to quit, emotions erupt. The Badlands send a survivalist home.

4. A Parasite to Behold

A newly formed tribe stalks and kills a caiman. A survivalist is on the brink when medics discover parasites in their digestive system.

5. Caiman Killers on the Loose

A massive food win buoys Terra and their whole team. Malorie stalks a bigger prize. Heather is shocked to learn Adam has not been sharing food.

6. A Camp Divided

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.

7. Big Group Energy

With all camps united, the group splinters to hunt resources. The new factions lead to a big protein win, but tension rises between Lynsey and Terra.

8. Prove It or Lose It

The final eight survivalists attempt an unprecedented two-day extraction. Malorie's struggles may cause medics to step in and end her challenge.