- Writer:
- Robert Gould
- Producer:
- Terence Dudley
- Film sequences - Cameraman:
- A.A. Englander
- Film sequences - Editor:
- Seymour Logie
- Designer:
- Lionel Radford
- Kemble:
- Robert Fyfe
- Supt Teale:
- Frank Forsyth
- Sgt O'Keefe:
- Edwin Brown
- Duty Officer Wells:
- Philip Anthony
- Policemen:
- Rex Robinson
- Policemen:
- John Lawrence
- Doctor:
- George Waring
- Currell:
- Lewis Teasdale
- Enders:
- John Colin
- Technicians:
- Geoffrey Hibbert
- Technicians:
- Jeffrey Segal
- Technicians:
- Frank Singuineau
- Technicians:
- Talfryn Thomas
- Technicians:
- Desmond Jordan
- Jeff Murray:
- Raymond Mason
- Selwin:
- Martin Gordon
- Van Heusen:
- Keith Anderson
- Sir Robert Nailer:
- William Dexter
- Dr Alan Tullis:
- Ray Roberts
- Det-Chief Supt Allison:
- Fred Ferris
- Mathews:
- Frank Shelley
- Templeton:
- Graham Suter
- Creighton-Smith:
- Norman Pitt
- Det-Chief Supt Stroud:
- George Street
- Mrs Stone:
- Joan Frank
- Lady Nailer:
- June Tobin
- Ilson:
- John Moore
- Dr Rendini:
- Mellan Mitchell
- Computer Technician:
- Arthur White
- Pam:
- Laura Graham
- Anderson:
- Frederick Treves
- Radio announcer:
- John Graham
