After fourteen days, many who remain are struggling to adapt to their environment and each other. Some consider migrating to try and find new resources, while in other camps tension continues to rise and may lead to our second tap out of the season.

The remaining survivalists trek across the scorching savanna to find food.

The 10 remaining survivalists cross the 21-day milestone and enter into uncharted waters. Scarce resources send the survivalists on a collision course. They fight for their lives with a huge electric eel and are visited by a gigantic puma.

The dehydrated and protein-starved competitors compete for resources.

The survivalists struggle to find nourishment to survive extraction.

The groups begin the treacherous, 10-mile journey to the extraction point.

The survivors reunite to discuss the challenge and answer fan questions.

In a special one-hour preview, 12 Naked & Afraid veterans prepare for the most formidable survival challenge on the planet - surviving 40 days and 40 nights in the sun-scorched bush of South Africa.

Makani desperately pushes through the broiling valley to find a new tribe. Ryan hatches a high-risk plan to get a kill. Suzanne plots her exit from Seth, but Africa's heat thwarts her plan and forces a survivalist to leave the challenge.

With extraction just days away, one survivalist goes against the group, is banished and must try to complete the challenge alone. Gwen and Sarah deploy crossbows as they push for one last kill. A deadly snake could end someone's challenge on Day 40.

Learn about the three categories that are factored into a Primitive Survival Rating (PSR): experience, skill, and mental approach. Then, take a look back at survivalists from previous seasons to understand how their final scores were calculated.

Jonathan aims to free himself from a stingy situation with little movement.

Jonathan tests his ability to hold his breath under water.

Jonathan Goodwin wages war against the forces of gravity.

Escapologist Jonathan Goodwin tests his escaping ability while spinning. He rides down a hill in an out-of-control locked barrel, gets off a rapidly spinning chair, and takes a wild ride on the Water Wheel of Doom-all in the name of science.

Escapologist Jonathan Goodwin takes the pain and tests his abilities while dealing with projectiles and the science behind them. He gets pummeled with tennis balls flying at 45 mph, high-dives into kiddie pools, and is launched 65 feet in the air.