Lost Land of the Volcano

Episode 3 (1x3)

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George McGavin travels east to an erupting volcano and discovers a rare bird that depends on the hot ash for its survival. Sudden explosions bring the trip to a quick halt as giant boulders crash into camp. The series culminates in the lost world of the crater as Steve and wildlife cameraman Gordon Buchanan discover two large mammals that have no fear of people and are brand new species: a giant rat that is as big as a cat, and a cuscus, which is a tree-climbing marsupial.