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Paul Carpenter as Val Neal |
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Patricia Roc as Mary Foster |
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Roland Culver as Dr. Francis Pelham |
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William Hartnell as Inspector Ross |
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Gordon Boyd as Detective Sergeant Davis |
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Edgar Driver as Atkins |
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Tom Tann as Wang |
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Ellen Pollock as Miss Barbara Barton |
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Robert Sansom as Senior Test Flight Official |
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Martin Wyldeck as Dr. Bradford |
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John Serret as Dr. Martin |
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Oliver Johnston as Dr. Kenyon |
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Kay Callard as Susie |
| Production | Alec C. Snowden | Producer |
| Editing | Geoffrey Muller | Editor |
| Writing | Montgomery Tully | Screenplay |
| Directing | Montgomery Tully | Director |
| Writing | Falkland L. Cary | Theatre Play |
| Sound | Trevor Duncan | Original Music Composer |
| Camera | Phil Grindrod | Director of Photography |
| Costume & Make-Up | Anne Box | Hairdresser |
| Directing | Marjorie Owens | Continuity |
| Sound | Derek Holding | Sound Editor |
| Directing | Bill Shore | Assistant Director |
| Sound | Sidney Rider | Sound Recordist |
| Production | Jim O'Connolly | Production Manager |
| Sound | Ronald Abbott | Sound Recordist |
| Art | C. Wilfred Arnold | Art Direction |
| Costume & Make-Up | Maude Churchill | Wardrobe Master |
| Costume & Make-Up | Jack Craig | Makeup Artist |
| Camera | Ronnie Taylor | Camera Operator |
