Full Credits
12 members

Barry Jones
Professor John Malcolm Francis Willingdon

André Morell
Superintendent G.W. Folland
Olive Sloane
Goldie Phillips

Sheila Manahan
Ann Willingdon

Hugh Cross
Stephen Lane

Joan Hickson
Mrs. Emily Georgina Peckett

Ronald Adam
Arthur Lytton, the Prime Minister

Marie Ney
Mrs. Willingdon

Joss Ackland
Station Policeman

Marianne Stone
Woman in Phone Box

John Stratton
Army Mechanic
George Spence
Man on Bus (uncredited)
29 members
Mike Johnson
Assistant Director
Roy Boulting
Director
John Boulting
Director
Shirley Barnes
Continuity
Roy Boulting
Screenplay
Frank Harvey
Screenplay
Paul Dehn
Story
James Bernard
Story
Peter De Sarigny
Associate Producer
John Palmer
Production Manager
John Boulting
Producer
Roy Boulting
Producer
Dorothy Holloway
Casting
Ray Sturgess
Camera Operator
Robert Huke
Camera Operator
Gerald Moss
Camera Operator
Dennis Fox
Camera Operator
Gilbert Taylor
Director of Photography
Bert Ross
Sound Recordist
Bert Eggleton
Sound Editor
Ann Chegwidden
Assistant Sound Editor
Hubert Clifford
Conductor
John Addison
Original Music Composer
Eric Cass
Boom Operator
John Elphick
Production Design
U. P. Hutchinson
Makeup Artist
Honoria Plesch
Costume Design
John Boulting
Editor
Roy Boulting
Editor