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