Directed by
| Roy Ward Baker | ... | (as Roy Baker) |
Writing Credits (in alphabetical order)
| Jimmy Sangster | ... | (novel) |
| Jimmy Sangster | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| Robert Horton | ... | John Smith | |
| Sebastian Cabot | ... | Max | |
| Jill St. John | ... | Mary Harper | |
 |
Dudley Foster | ... | Leo |
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Clive Graham | ... | Johns |
| George Roubicek | ... | Karkov | |
| Eric Pohlmann | ... | Borensko | |
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Eric Longworth | ... | Boreman |
| Eleanor Summerfield | ... | Mrs. Roberts | |
| Timothy Bateson | |||
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Blake Butler | ||
| Warren Stanhope | |||
| Martin Wyldeck | |||
| Rest of cast listed alphabetically: | |||
| Terence Brady | ... | (uncredited) | |
| Carol Cleveland | ... | Girl (uncredited) | |
| Carol Dilworth | ... | (uncredited) | |
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Anna Gilchrist | ... | (uncredited) |
| Constantine Gregory | ... | (uncredited) | |
| Drewe Henley | ... | Barker (uncredited) | |
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Alex Miller | ... | Folk Singer (uncredited) |
| Michael Segal | ... | (uncredited) | |
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Anthony Stamboulieh | ... | (uncredited) |
Produced by
| Harold D. Cohen | ... | executive producer (as Harold Cohen) |
| Jimmy Sangster | ... | producer |
Music by
| Johnny Pearson | ||
Cinematography by
| Arthur Grant | ||
Editing by
| Spencer Reeve | ||
Art Direction by
| Scott MacGregor | ||
Makeup Department
| Eddie Knight | ... | makeup artist |
| Joan White | ... | hair stylist |
Production Management
| Donald Toms | ... | production manager (as Don Toms) |
Second Unit Director or Assistant Director
| Bert Batt | ... | assistant director |
Art Department
| John Lageu | ... | assistant art director |
Sound Department
| Ken Barker | ... | sound mixer |
| Robert T. MacPhee | ... | sound recordist (as Robert McPhee) |
| Wilfred Thompson | ... | sound editor |
| Graham V. Hartstone | ... | sound camera operator (uncredited) |
| Otto Snel | ... | re-recording mixer (uncredited) |
Camera and Electrical Department
| Neil Binney | ... | camera operator |
Music Department
| Philip Martell | ... | musical director |
Script and Continuity Department
| Valerie Booth | ... | continuity |
