| Person | Type | Job | Role(s) |
|---|---|---|---|
 Albert Whitlock | Crew | Crew | Special Effects |
 Anthony Asquith | Crew | Directing | Director |
Antony Darnborough | Crew | Production | Producer |
Arthur Alcott | Crew | Crew | Production Controller |
Benjamin Frankel | Crew | Sound | Original Music Composer |
Bryan Langley | Crew | Crew | Special Effects |
Desmond Dickinson | Crew | Camera | Director of Photography |
 Earl St. John | Crew | Production | Executive Producer |
 George Pollock | Crew | Directing | Assistant Director |
Gordon K. McCallum | Crew | Sound | Sound Recordist |
Harry Miller | Crew | Sound | Sound Editor |
John Howell | Crew | Art | Art Direction |
John Pudney | Crew | Writing | Writer |
 Julie Harris | Crew | Costume & Make-Up | Costume Design |
Muir Mathieson | Crew | Sound | Conductor |
Stanley Grant | Crew | Camera | Aerial Director of Photography |
W.T. Partleton | Crew | Costume & Make-Up | Makeup Artist |
Yvonne Axeworthy | Crew | Directing | Continuity |
Bill Warrington | Crew | Crew | Special Effects |
Frederick Wilson | Crew | Editing | Editor |
William Fairchild | Crew | Writing | Screenplay |
Hugh Attwooll | Crew | Production | Production Manager |
John Dennis | Crew | Sound | Sound Recordist |
H. A. R. Thomson | Crew | Camera | Camera Operator |
Caven Watson | Cast | Dr. Ferguson | |
 Cyril Chamberlain | Cast | Actor | Inspector Carter |
Geoffrey Denton | Cast | Actor | Fisher |
 Hal Osmond | Cast | Actor | Agent Lawson |
 Hartley Power | Cast | Actor | General Adams (uncredited) |
 Herbert Lom | Cast | Actor | Dr. Alex Leon |
 Herbert Lomas | Cast | Actor | George Jackson |
 James Donald | Cast | Actor | Michael Heathley |
 Johnnie Schofield | Cast | Actor | Jim Barnes (uncredited) |
 Marianne Stone | Cast | Actress | Maisie |
 Marjorie Fielding | Cast | Actress | Michael's Mother |
 Maurice Denham | Cast | Actor | Prof. Carrington |
 Muriel Pavlow | Cast | Actress | Caroline Cartier |
 Noel Willman | Cast | Actor | Dr. Dennis Bord |
 Patric Doonan | Cast | Actor | Brian Jackson |
 Philip Ray | Cast | Actor | Sentry (uncredited) |
 Phyllis Calvert | Cast | Actress | Lydia Heathley |
 Robert Beatty | Cast | Actor | Maj. Sam Seagram |
 Stanley Maxted | Cast | Actor | Prof. Adams |
 Walter Fitzgerald | Cast | Actor | Sir Charles Craddock |
John Warren | Cast | Actor | Ted (uncredited) |
| Person | Type | Job | Role(s) |
