The Great Mojave Desert
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February 13, 1971

Episode 1 of 1971 premiered on February 13, 1971

Journey to the High Arctic
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April 15, 1971

Episode 2 of 1971 premiered on April 15, 1971

Monkeys, Apes & Man
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October 21, 1971

Episode 3 of 1971 premiered on October 21, 1971