Distributia
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Will LymanHimself - Narrator (voice)
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OliverEl însuși
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Wallace SwettHimself - President, Primarily Primates San Antonio, Texas
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Todd DisotellHimself - Biological Anthropologist, New York University (as Dr. Todd Disotell)
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Will Harcourt-SmithHimself - Paleoanthropologist, American Museum of Natural History (as Dr. Will Harcourt-Smith)
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Peter TseHimself - Neuroscientist, Dartmouth College (as Dr. Peter Tse)
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Anne StoneHerself - Geneticist
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Debbie MartyrHerself - Conservationist
