Professor Davis, who teaches at a correspondence school, discovers that a Nazi Agent is trying to prevent a trade treaty being signed between England and South America. The agent is posing as an economics expert seconded to the trade delegation. The professor must find the real economist and expose the agent.
| role | name |
|---|---|
| Professor Davis | Will Hay |
| Bobby Jessop | John Mills |
| Arthur Costello | Basil Sydney |
| Prof. Davys | Henry Hewitt |
| J.B. Crabtree | Felix Aylmer |
| Harman | Owen Reynolds |
| Dr. Innsbach | Frank Cellier |
| Sir John | Joss Ambler |
| Onslowe | Frank Allenby |
| Joyce | Thora Hird |
| role | name |
|---|---|
| Director | Basil Dearden |
| Director | Will Hay |
| Writer | Angus MacPhail |
| Writer | John Dighton |
| Producer | Michael Balcon |
| Editor | Ray Pitt |
