72 Hours S01E04 - Flinder's Island, Tasmania

Dropped off on a remote Tasmanian island, three teams composed of three strangers must navigate their way through jagged beaches, hazardous brush covered mountains and swamp-like lagoons while enduring freezing rains and strong winds in order to locate a briefcase full of cash in just 72 hours. All they have to accompany them in their quest for $100,000 are their teammates, the clothes on their backs, a GPS and one bottle of water.