Synopsis
The world is shocked by the appearance of three talking chimpanzees, who arrived mysteriously in a spacecraft. Intrigued by their intelligence, humans use them for research - until the apes attempt to escape.
Cast

Roddy McDowall
Cornelius

Kim Hunter
Dr. Zira

Bradford Dillman
Dr. Lewis Dixon

Natalie Trundy
Dr. Stephanie 'Stevie' Branton

Eric Braeden
Dr. Otto Hasslein

William Windom
The President

Sal Mineo
Dr. Milo

Albert Salmi
E-1

Jason Evers
E-2

John Randolph
Committee Chairman

Harry Lauter
General Winthrop

M. Emmet Walsh
Aide

Roy Glenn
Lawyer (as Roy E. Glenn Sr.)

Peter Forster
Cardinal

Norman Burton
Army Officer

William Woodson
Naval Officer

Tom Lowell
Orderly
Gene Whittington
Marine Captain

Donald Elson
Curator
Bill Bonds
TV Newscaster

Army Archerd
Referee

James Bacon
General Faulkner

Ricardo Montalban
Armando

John Alderman
Marine Corporal (uncredited)
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