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Season 4 Episode List
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Episode 1 - Amazon
Release Date: 1968-02-20 -
Episode 2 - The Lonely Dorymen: Portugal's Men of the Sea
Release Date: 1968-04-16 -
Episode 3 - America's Wonderlands: The National Parks
Release Date: 1968-11-28 -
Episode 4 - Reptiles and Amphibians
Release Date: 1968-12-03 -
Episode 22 - Episode 22
Release Date: