Oyuncular (30)
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)
Alan Baxter
General (uncredited)
Jack Berle
Secretary of State (uncredited)
Paul Bradley
Official at Briefing (uncredited)
Karl Bruck
German Newscaster (uncredited)
Sam Chew Jr.
Undetermined (uncredited)
Robert Cole
Reporter (uncredited)