An expedition into the interior of Papua New Guinea comes across a tribe of ape-like people who may or may not be ancestors of early man.
Burt Reynolds
as Douglas Temple
Susan Clark
as Dr. Sybil Greame
Roger C. Carmel
as Otto Kreps
Paul Hubschmid
as Vancruysen
Chips Rafferty
as Father 'Pop' Dillingham
Alexander Knox
as Buffington
Pat Suzuki
as Topazia
Edward Fox
as Bruce Spofford
Wilfrid Hyde-White
as Eaton
William Marshall
as Attorney General
Rhys Williams
as Judge Draper
Mort Marshall
as Dr. Figgins
