Desperate for food, Jake and Waz brave frigid water to build a dam. Gabby takes a huge risk that could lead to hypothermia. Jermaine and Sarah clash over survival strategies. A team secures the first big food win of the challenge.

Wes confronts Sarah about her contributions to the team. A mountain lion stalks the survivalists. Jermaine's trapping efforts are rewarded. Ky taps her primitive skills to treat an injury. Medics are forced to remove a survivalist from the challenge.