Eccentric Cambridge archaeologist Horatio Smith takes a group of British and American archaeology students to pre-war Nazi Germany to help in his excavations. His research is supported by the Nazis, since he professes to be looking for evidence of the Aryan origins of German civilisation. However, he has a secret agenda: to free inmates of the concentration camps.
| Directing | Leslie Howard | Director |
| Writing | Anatole de Grunwald | Screenplay |
| Crew | Mutz Greenbaum | Technical Supervisor |
| Writing | A. G. MacDonell | Original Story |
| Writing | Wolfgang Wilhelm | Original Story |
| Writing | Anatole de Grunwald | Scenario Writer |
| Writing | Roland Pertwee | Scenario Writer |
| Production | Harold Huth | Associate Producer |
| Camera | Mutz Greenbaum | Director of Photography |
| Editing | Sidney Cole | Editorial Manager |
| Art | Duncan Sutherland | Settings |
| Directing | George Pollock | Assistant Director |
| Editing | Douglas Myers | Editor |
| Camera | Jack Hildyard | Camera Operator |
| Production | Phil C. Samuel | Production Manager |
| Sound | John Greenwood | Original Music Composer |
| Sound | Muir Mathieson | Music Director |
| Sound | John Dennis | Sound Recordist |
| Sound | A.W. Watkins | Recording Supervision |
| Production | Leslie Howard | Producer |
| Writing | Baroness Emmuska Orczy | Novel |
