Capt. Johnnie Gray is enlisted by Mr. J.G. Reeder to infiltrate a gang of forgers in Dartmoor jail on behalf of the Bank of England.
| Directing | Norman Lee | Director |
| Writing | Victor Kendall | Scenario Writer |
| Crew | Elizabeth Meehan | Treatment |
| Writing | Doreen Montgomery | Scenario Writer |
| Writing | Edgar Wallace | Novel |
| Production | John Corfield | Producer |
| Sound | Ronnie Munro | Music |
| Crew | Eric Cross | Cinematography |
| Editing | Ted Richards | Editor |
| Production | George Collins | Production Manager |
| Directing | Jack Martin | Assistant Director |
| Art | Duncan Sutherland | Art Department Manager |
| Sound | Frank Midgley | Sound Recordist |