Finding food becomes crucial as extreme hunger kicks in. Fishing the Mackenzie River is far from easy, which leaves some competitors increasingly desperate. For one first-time fisher, who has had severe anxiety and panic attacks in the past, the constant trial and error becomes a mental and physical battle. Another competitor faces a hard choice when their net catches something unexpected.

One contestant builds a makeshift mousetrap and finds a bonus source of energy - but suffers an injury that could threaten their chances in the competition. Meanwhile, fishing efforts are sabotaged by a beaver and attempts to find meals become increasingly desperate. The mental challenge of surviving alone takes its toll, as one contestant relives a heartbreaking time from their past and loneliness reaches crisis point for another.