Directed by
| Walter Forde | ||
Writing Credits
| Edgar Wallace | ... | (based on The Ringer by) |
| Sidney Gilliat | ... | (screen play) |
Cast (in credits order) complete, awaiting verification
| Sonnie Hale | ... | Samuel Cuthbert 'Sam' Hackett | |
| Wilfrid Lawson | ... | Maurice Meister | |
| Louise Henry | ... | Cora Ann Milton | |
| Alexander Knox | ... | Dr Lomond | |
 |
Peter Croft | ... | John Lenley |
| George Merritt | ... | Police Station Sergeant | |
| Patrick Barr | ... | Det. Insp. Alan Wembury | |
| John Longden | ... | Inspector Bliss | |
| Patricia Roc | ... | Mary Lenley | |
| Arthur Hambling | ... | Detective Sgt. Richards | |
| Charles Eaton | ... | Col. Walford | |
| Rest of cast listed alphabetically: | |||
|
|
Cameron Hall | ... | Drunken Scotsman (uncredited) |
| John Turnbull | ... | Prison Governor (uncredited) | |
Produced by
| Michael Balcon | ... | producer |
| S.C. Balcon | ... | associate producer |
Music by
| Ernest Irving | ... | (uncredited) |
Cinematography by
| Ronald Neame | ... | (photography) |
| Gordon Dines | ... | (uncredited) |
Editing by
| Charles Saunders | ||
Art Direction by
| Oscar Friedrich Werndorff | ... | (as O.F. Werndorff) |
Production Management
| Slim Hand | ... | production manager (as Harry Hand) |
Art Department
| Gunnar Håkansson | ... | poster artist : Sweden (uncredited) |
| Eric Rohman | ... | poster artist : Sweden (uncredited) |
Sound Department
| Eric Williams | ... | sound |
| Stephen Dalby | ... | sound recordist (uncredited) |
Camera and Electrical Department
| Paul Beeson | ... | camera operator (uncredited) |
Music Department
| Ernest Irving | ... | musical director (uncredited) |
