Directed by
| Cy Endfield | ... | (as Cyril Enfield) |
Writing Credits
| Leo Davis | ... | (screenplay) |
| John Dickson Carr | ... | (stories) (uncredited) |
Cast (in credits order) verified as complete
| Boris Karloff | ... | Colonel March | |
| Ewan Roberts | ... | Insp. Ames | |
| Richard Wattis | ... | Cabot | |
| Sheila Burrell | ... | Joan Forsythe | |
| Anthony Forwood | ... | Jim Hartley | |
| Ronald Leigh-Hunt | ... | Ireton Bowlder | |
| Patricia Owens | ... | Betty Hartley (archive footage) | |
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John Hewer | ... | John Parrish |
| Joan Sims | ... | Marjorie Dawson | |
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Roger Maxwell | ... | Maj. Rodman |
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Sonya Hana | ... | Paula |
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Bernard Rebel | ... | The Count |
| Dana Wynter | ... | Francine Rapport (as Dagmar Wynter) | |
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Nita Valerie | ... | Librarian |
| Rest of cast listed alphabetically: | |||
| Peter Butterworth | ... | Bank clerk (uncredited) | |
| Cy Endfield | ... | Man leaving British Museum library (uncredited) | |
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Pat Hagan | ... | Police Constable at Bank (uncredited) |
| Victor Harrington | ... | Customer in Bank (uncredited) | |
| Charles Saynor | ... | Police Constable (uncredited) | |
| Marianne Stone | ... | Customer in Bank (uncredited) | |
Produced by
| Donald Ginsberg | ... | producer |
Music by
| John Lanchbery | ||
Cinematography by
| Jonah Jones | ... | (lighting cameraman) |
Editing by
| Stanley Willis | ... | (as Stan Willis) |
Art Direction by
| George Paterson | ||
Makeup Department
| Jill Carpenter | ... | makeup artist |
| Joan Carpenter | ... | hairdresser |
Production Management
| Harold Richmond | ... | production manager |
Second Unit Director or Assistant Director
| Claude Hudson | ... | assistant director (as Claud Hudson) |
| George Pollard | ... | assistant director |
Sound Department
| Charles Tasto | ... | sound mixer |
| Alfred Wilson | ... | dubbing editor |
| Eric Cass | ... | boom operator (uncredited) |
| Eric Vincent | ... | sound maintenance (uncredited) |
Camera and Electrical Department
| Eric Besche | ... | camera operator |
| Desmond Davis | ... | focus puller (uncredited) |
| James Devis | ... | clapper loader (uncredited) |
Costume and Wardrobe Department
| Brenda Dabbs | ... | wardrobe mistress (as Brenda Gardner) |
Music Department
| Eric Robinson | ... | musical director |
| Billy Sproud | ... | composer: dance music / dance music played by |
Script and Continuity Department
| Joanna Busby | ... | continuity |
Additional Crew
| Raden Mas Oetomo | ... | Javanese dance staged by |
| Patricia Lees | ... | production secretary (uncredited) |