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Four friends set out on a grueling jungle expedition to investigate a rumor of giant golden dorado in an uncharted Bolivian river. In their quest to be the first to fish these waters, they'll face torrential rains, deadly insects, and uncontacted tribes.

The guys head deep into Zambia in search of large tigerfish and the only things standing in their way are 400 miles of unpaved roads, crocodiles, hippos and a serious lack of fuel.

The crew heads to Mongolia in search of taimen, the largest, most ferocious member of the salmon family.

The men risk life and limb traveling through Borneo's jungles in search of mahseer, which has been fished almost to extinction.

The team follows a lead to an extremely remote river in Greenland, believed to hold massive Arctic char. With its barren tundra, towering fjords, and ice-carved valleys, they discover Greenland is wilderness at its most pure and most dangerous.

The crew travels to Australia, where aboriginal guides take them way off the grid to a fisherman's paradise in search of barramundi.

The crew heads to one of the most remote and inhospitable jungles of Ecuador to try and land an arapaima, the largest scaled freshwater fish in the world.

Off the extreme eastern tip of Papua New Guinea lies Milne Bay and it's rumored to be home to huge schools of one of the greatest sportfish ever, the giant trevally; trying to hook and land a giant trevally on a fly rod will be the ultimate test.

In Mexico, the crew navigates a maze of crocodile and mosquito-infested waterways and lagoons in search of a rumored paradise for fishing tarpon.

Lake Windsor on Inagua Island is home to a mystery. How did giant ocean-dwelling fish get into a lake with no natural inlet or outlet? The Fish or Die team journeys to the tropics to investigate the mystery and hopefully catch some world-class bonefish.