Full Credits
23 members

Marshall Thompson
Major Jeff Cummings

Kynaston Reeves
Prof. R. E. Walgate

Kim Parker
Barbara Griselle

Stanley Maxted
Col. Butler

Terry Kilburn
Capt. Al Chester
James Dyrenforth
Mayor Hawkins
Robert MacKenzie
Const. Howard Gibbons

Peter Madden
Dr. Bradley
Gil Winfield
Dr. Warren

Michael Balfour
Sgt. Kasper
Launce Maraschal
Melville
Meadows White
Ben Adams
E. Kerrigan Prescott
Atomic Engineer
Lala Lloyd
Amelia Adams
Shane Cordell
Nurse
Sheldon Allan
Sentry (uncredited)
Alexander Archdale
Minister (uncredited)
Eddie Boyce
Jacques Griselle (uncredited)
Victor Hagan
Villager (uncredited)
Victor Harrington
Villager (uncredited)
Jack Hetherington
Sergeant in Office (uncredited)
Richard Neller
Townsman (uncredited)

Tom Watson
Technical Sergeant (uncredited)
25 members
Arthur Crabtree
Director
Douglas Hickox
Assistant Director
Hazel Swift
Continuity
Herbert J. Leder
Screenplay
Amelia Reynolds Long
Original Story
Richard Gordon
Executive Producer
Ronald Kinnoch
Production Manager
Ronald Kinnoch
Co-Producer
Charles F. Vetter
Executive Producer
John Croydon
Producer
Lionel Banes
Director of Photography
Leo Rogers
Camera Operator
Martin Curtis
Second Unit Director of Photography
Buxton Orr
Original Music Composer
Terry Poulton
Sound Editor
Frederic Lewis
Conductor
Peter T. Davies
Sound Recordist
John Elphick
Set Designer
Barbara Barnard
Hairstylist
Jim Hydes
Makeup Artist
Anna Duse
Costume Supervisor
Richard Q. McNaughton
Editor
Peter Neilson
Special Effects
Flo Nordhoff
Special Effects
Karl-Ludwig Ruppel
Special Effects