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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.
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.
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.