Alexander Scourby

Narrator (voice)

Richard Kiley

Narrator

Frank C. Craighead

Self

John Craighead

Self

Leslie Nielsen

Narrator (voice)

Jane Goodall

Self

Orson Welles

Narrator

Dian Fossey

Self

Birute Galdikas

Self

Glenda Jackson

Narrator

John Craighead

Self

Joseph Campanella

Narrator (voice)

Frank Craighead Sr.

Self

Richard Basehart

Narrator (voice)

E.G. Marshall

Narrator

Ian Holm

Narrator (voice)

John Huston

Narrator (voice)

James Whitmore

Narrator (voice)

Musindo Mwinyipembe

Narrator (voice)

Irwin Rosten

Director

Marshall Flaum

Director

Irwin Rosten

Writer

Marshall Flaum

Writer