A lawyer receives a note telling him that he'll be dead in 48 hours - and Scotland Yard must work fast to uncover the serial killer known as 'The Ringer'.
| Directing | Walter Forde | Director |
| Writing | Sidney Gilliat | Screenplay |
| Sound | Ernest Irving | Original Music Composer |
| Writing | Edgar Wallace | Novel |
| Editing | Charles Saunders | Editor |
| Crew | Ronald Neame | Cinematography |
