Director: Don Taylor
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.
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
