The Wheel

With minimal supplies, a wrestler, a plumber, a fitness model, a former Marine, a nurse and an ultra-marathoner face a gauntlet.

Ripped from their first location, participants must start over in another extreme ecozone; Luke battles caimans for supremacy of the wetlands; Lindsay searches for water in 105-degree heat.

The second location takes a mental toll; Lindsay makes a fateful decision; caimans hunt Luke in the wetlands; Shon's struggle for food pushes him to the brink; Adam fails to make fire and suffers the consequences.

Shon makes a spear launcher while Luke returns to hunting alligator; Adam and Josh struggle to find water and make fire.

Lindsay shrinks to an unhealthy weight; Luke catches fish, but struggles to stave of the isolation; Shon's body shuts down.

Shon's fate is decided; the participants enter Phase Four; Lindsay's hopes are dashed by the barren Tundra; Adam forages in the Wetlands, but is wrecked by caimans; Luke faces the ultimate mountain challenge.