Casting

Director

Jack Arnold

Producer

Walter Shenson

Screenplay

Roger MacDougall, Stanley Mann

Novel

Leonard Wibberley

Original Music Composer

Edwin Astley

Director of Photography

John Wilcox

Editor

Raymond Poulton

Art Direction

Geoffrey Drake

Makeup Artist

Stuart Freeborn

Camera Operator

Austin Dempster

Peter Sellers
Peter SellersGrand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
Jean Seberg
Jean SebergHelen Kokintz
William Hartnell
William HartnellWill Buckley
David Kossoff
David KossoffProfessor Alfred Kokintz
Leo McKern
Leo McKernBenter
MacDonald Parke
MacDonald ParkeGeneral Snippet
Austin Willis
Austin WillisUnited States Secretary of Defense
Timothy Bateson
Timothy BatesonRoger
Monte Landis
Monte LandisCobbley
Alan Gifford
Alan GiffordAir Raid Warden
Colin Gordon
Colin GordonBBC Announcer
Harold Kasket
Harold KasketPedro
Guy Deghy
Guy DeghySoviet Ambassador (uncredited)
Eve Eden
Eve EdenSpectator (uncredited)
Bill Edwards
Bill EdwardsArmy Captain (uncredited)
?
Mabel EtheringtonAda - Lady in Waiting (uncredited)
?
Muriel GreensladeLady in Waiting (uncredited)
?
Fred HaggertyFenwickian (uncredited)
?
Juba KennerleyMaybury (uncredited)
?
George MargoO'Hara (uncredited)
Lionel Murton
Lionel MurtonAmerican General at the Pentagon (uncredited)
Bill Nagy
Bill NagyU.S. Policeman (uncredited)
Robert O'Neil
Robert O'NeilReporter (uncredited)
Pat Ryan
Pat RyanAmerican General (uncredited)
Stuart Saunders
Stuart SaundersSergeant (uncredited)
?
Fred StroudFenwickian (uncredited)
?
John TatumAmerican Admiral (uncredited)
Mavis Villiers
Mavis VilliersTelephone Operator (uncredited)
?
Fred WoodBird Seller (uncredited)