On screen
Cast
8 credited performers
Jacques-Yves Cousteau
Self (archive footage)
Dian Fossey
Self (archive footage)
Artwork unavailable
Birute Galdikas
Self
Jane Goodall
Self (archive footage)
Richard Kiley
Self - Narrator
Artwork unavailable
Louis Leakey
Self (archive footage)
Artwork unavailable
Mary Leakey
Self (archive footage)
Artwork unavailable
Kent Vliet
Self (archive footage)