理查德·基利

Richard Kiley

饰：Himself - Narrator

Louis Leakey

饰：Himself

Mary Leakey

饰：Herself

Kent Vliet

饰：Himself

雅克-伊夫·库斯托

Jacques-Yves Cousteau

饰：Himself

戴安·福西

Dian Fossey

饰：Herself

Birute Galdikas

饰：Herself

珍·古道尔

Jane Goodall

饰：Herself