A primitive weapons challenge where survivalists build and use atlatls leads to a shocking elimination matchup. Multiple teams score huge protein wins, but Mexico's food struggles may lead medics to intervene. A raging storm causes a shelter to collapse.

The final three teams migrate to the shores of the Indian Ocean. Two teams score crab, stingray and octopus, but the third struggles to get food. During a smoke-and-snare challenge, unexpected stumbles lead to a shocking elimination challenge.