Directed by Richard Lester
Produced by Walter Shenson
Based on Novel by Leonard Wibberley
Written by Michael Pertwee
Cinematography by Wilkie Cooper
Film Editing by Bill Lenny
Music by Ron Grainer
Production Design by John Howell
Costume Design by Anthony Mendleson
Title Designer : Maurice Binder
Animator : Trevor Bond
Cast
Margaret Rutherford (Grand Duchess Gloriana)
Ron Moody (Prime Minister Mountjoy)
Bernard Cribbins (Vincent Mountjoy)
David Kossoff (Professor Kokintz)
Terry-Thomas (Spender)
June Ritchie (Cynthia)
John Le Mesurier (British Delegate)
John Phillips (Amercian Delegate)
Eric Barker (MI5 Man)
Roddy McMillan (Benter)
Tom Aldredge (Wendover)
Michael Trubshawe (British Aide)
Peter Sallis (Russian Delegate)
Clive Dunn (Bandleader)
Hugh Lloyd (Plumber)
Gerald Anderson (Member of Whitehall Conference)
Robin Bailey (Member of Whitehall Conference)
Jan Conrad (Russian Aide)
Archie Duncan (American General)
Graham Stark (Standard Bearer)
Mario Fabrizi (Valet)
John Bluthal (Von Noldol)
Guy Deghy (Russian Scientist)
Richard Marner (Russian General)
Allan Cuthbertson (Member of Whitehall Conference)
Gordon Phillott (Civil Sergeant)
John Wood (Countryman)
George Chisholm (Wine Waiter)
Rosemary Scott (Launching Lady)
Vincent Ball (Pilot)
Frank Duncan (News announcer)
Ed Bishop (American Astronaut)
Bill Edwards (American astronaut)
Laurence Herder (Russian astronaut)
Harvey Hall (Russian astronaut)
Frankie Howerd (Himself)
Beverly Bennett
Michael Caspi
Paul Cole
Larry Cross
Stringer Davis (1st Councillor)
Lucy Griffiths (Lady-in-Waiting)
Sandra Hampton (April)
Robert Haynes
Murray Kash
Bruce Lacey (Bandleader)
Frank Lieberman (American Civilian)
Coral Morphew (Peasant Girl)
Carolyn Pertwee (June)
Stuart Saunders (Sergeant)
Kevin Scott (American Journalist)