Carter is in the Bolivian jungle in pursuit of a mythical fish that's known for its strength and razor-sharp teeth — the golden dorado. In the hopes of hooking this formidable foe, Carter pushes his limits as he and a local chief trek up a secluded river to an ancient waterfall. With supplies running low and more challenges at bay, will Carter catch the dorado he's after?

Carter journeys deep into the South American rainforest of Peru to track and catch the legendary arapaima, an apex predator and prehistoric jungle fish that can reach weights of over 300 pounds. Carter will have to dodge snakes, piranhas and the constant threat of violent storms while tracking this elusive giant.

Carter braves the oceans of the North Atlantic to fish for one of the largest and fastest creatures in the sea, the bluefin tuna. Traveling to Nova Scotia and Prince Edward Island, Carter is intent on catching an over 1,000-pound bluefin, a species previously overfished. Yet, fishing experts have indicated their comeback, leading Carter to trace leads to see if these legends are still out there.