Directed by
| Lance Comfort | ||
Writing Credits (in alphabetical order)
| Anthony Armstrong | ... | (novel) |
| Guy Morgan | ... | (screenplay) |
Cast (in credits order) verified as complete
| Derek Farr | ... | Ivan Mason / Dr. James Paxton | |
| Ella Raines | ... | Rhona Ellison | |
| Donald Wolfit | ... | Professor Cattrell | |
| Lisa Daniely | ... | Nurse Mitzi (as Lisa Danielly) | |
| Karel Stepanek | ... | Dmitri Balinkev | |
| Cyril Cusack | ... | Dr. Kelly | |
| Olive Sloane | ... | Mrs. Lemmin - the Landlady | |
 |
Bruce Beeby | ... | Dr. Manning |
| Russell Napier | ... | Scotland Yard Supt. Davidson | |
|
|
Frederick Piper | ... | Medwood Inspector Hayman |
| John Welsh | ... | George White - the Gamekeeper | |
|
|
Alfred Maron | ... | Ambulance Driver |
| Rest of cast listed alphabetically: | |||
|
|
William Baskiville | ... | Police Officer (uncredited) |
| Jim Brady | ... | Balinkev's Thug (uncredited) | |
| Robert Bruce | ... | Scotland Yard Detective (uncredited) | |
|
|
Dan Cressey | ... | Police Officer (uncredited) |
|
|
Alex Graham | ... | Waiter (uncredited) |
| Alastair Hunter | ... | Publican (uncredited) | |
| Norman Mitchell | ... | Man in Opening Sequence (uncredited) | |
|
|
Cecil Paul | ... | Train Passenger (uncredited) |
Produced by
| Charles Leeds | ... | producer (as Charles A. Leeds) |
Music by
| Bruce Campbell | ||
Cinematography by
| Stanley Pavey | ... | (as Stan Pavey) (lighting cameraman) |
Editing by
| Jim Connock | ||
Art Direction by
| Eric Saw | ||
Makeup Department
| George Claff | ... | makeup artist |
Production Management
| R.E. Dearing | ... | production manager (as Bob Dearing) |
Second Unit Director or Assistant Director
| Frank Hollands | ... | assistant director |
Art Department
| Ray Simm | ... | set designer |
Camera and Electrical Department
| Eric Besche | ... | camera operator |
Music Department
| Philip Martell | ... | musical director |
Script and Continuity Department
| Rita Davison | ... | continuity (as Rita Davidson) |
