Caesar
Roddy McDowall
Breck
Don Murray
Hoskyns
H.M. Wynant
Aldo
David Chow
Frank - Gorilla
Buck Kartalian
Policeman
John Dennis
2nd Policeman
Paul Comi
Auctioneer
Gordon Jump
Announcer
Dick Spangler
Ape With Chain
Hector Soucy
Ape (uncredited)
James Bacon
Riot Control Commander in Plaza (uncredited)
Rayford Barnes
Armando
Ricardo Montalban
Man at Auction (uncredited)
William Bryant
Book Store Owner (uncredited)
Jean Byron
Controller (uncredited)
Sam Chew Jr.
Auction Attendee (uncredited)
Francis De Sales
Peter Eastman
Cafe Customer (uncredited)
Erin Fleming
Jailguard (uncredited)
Daniel Keough
Ron Pinkard
Restaurant Chef (uncredited)
Jeffrey Sayre
Woman in Plaza (uncredited)
Ruth Foster
MacDonald
Hari Rhodes
Kolp
Severn Darden
Busboy
Lou Wagner
Lisa
Natalie Trundy
Commission Chairman
John Randolph
Mrs. Riley
Asa Maynor
Zelda
Joyce Haber
Stunts
Eddie Smith
Gary Epper
Director
J. Lee Thompson
Craig R. Baxley
Tony Brubaker
Nick Dimitri
Erik Cord
Makeup Supervisor
Daniel C. Striepeke
George P. Wilbur
Eddie Hice
Gene LeBell
Characters
Pierre Boulle
Henry Kingi
Tony Epper
Producer
Arthur P. Jacobs
Alan Gibbs
Screenplay
Paul Dehn
Director of Photography
Bruce Surtees
Editor
Marjorie Fowler
Alan Jaggs
Original Music Composer
Tom Scott
Unit Publicist
Jack Hirshberg
Title Designer
Don Record
Larry Duran
Paula Crist
Bennie E. Dobbins
Richard E. Butler
Regina Parton
Regis Parton
Wally Rose
Alex Sharp
Glenn Randall Jr.
Stunt Coordinator
Paul Stader
Fred Waugh
Richard Washington
Whitey Hughes
Associate Producer
Frank Capra, Jr.
Troy Melton
Art Direction
Philip M. Jefferies
Production Design
Set Decoration
Norman Rockett
Costume Design
Morton Haack
Makeup Artist
Jack Barron
Joe DiBella
Makeup Designer
John Chambers
Special Effects Makeup Artist
Verne Langdon
Hairstylist
Jan Van Uchelen
Carol Pershing
Unit Production Manager
William Eckhardt
Assistant Director
David 'Buck' Hall
Second Assistant Director
Jack Stubbs
Sound
Don J. Bassman
Herman Lewis
Special Effects
Johnny Borgese