Marshall Thompson
Major Jeff Cummings
Acting
Kynaston Reeves
Prof. R. E. Walgate
Acting
Kim Parker
Barbara Griselle
Acting
Stanley Maxted
Col. Butler
Acting
Terry Kilburn
Capt. Al Chester
Acting
James Dyrenforth
Mayor Hawkins
Acting
Robert MacKenzie
Const. Howard Gibbons
Acting
Peter Madden
Dr. Bradley
Acting
Gil Winfield
Dr. Warren
Acting
Michael Balfour
Sgt. Kasper
Acting
Launce Maraschal
Melville
Acting
Meadows White
Ben Adams
Acting
E. Kerrigan Prescott
Atomic Engineer
Acting
Lala Lloyd
Amelia Adams
Acting
Shane Cordell
Nurse
Acting
Sheldon Allan
Sentry (uncredited)
Acting
Alexander Archdale
Minister (uncredited)
Acting
Eddie Boyce
Jacques Griselle (uncredited)
Acting
Victor Hagan
Villager (uncredited)
Acting
Victor Harrington
Villager (uncredited)
Acting
Jack Hetherington
Sergeant in Office (uncredited)
Acting
Richard Neller
Townsman (uncredited)
Acting
Tom Watson
Technical Sergeant (uncredited)
Acting