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| Cast |
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| Lena Schmidt | Brigitte HORNEY |
| Lieutenant Pierre de Montmalion | Neil HAMILTON |
| chief of the French secret service | Frederick LLOYD |
| chief of the German secret service | Raymond LOVELL |
| Henri | Charles CARSON |
| little man with the bald head | Ivor BARNARD |
| Agent J14 | Leslie PERRINS |
| Lieutenant Franz Abel | Gyles ISHAM |
| Robert Pigeon | Hay PETRIE |
| Karl Schmidt | Ben FIELD |
| proprietor of Barcelona club | Julian VEDEY (uncredited) |
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| Credits |
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| Directed by | Edmond T. GRÉVILLE |
| Presented by | Phoenix Films |
| Issued by | I.F.P. Ltd. |
| Produced by | Hugh PERCEVAL |
| Assistant Director | Vincent PERMANE |
| Screen Play | Basil MASON |
| | Hugh PERCEVAL |
| | Edmond T. GRÉVILLE |
| Dialogue | Jeffrey DELL |
| From a Story by | Paul de SAINT-COLOMBE |
| Photography by | Otto HELLER |
| Editor | Ray PITT |
| Art Director | R. Holmes PAUL |
| Gowns | Jane of Paris |
| Costumes | Morris Angel Ltd. |
| Music by | Walter GOEHR |
| Sound Recordist | William YEARSLEY |
| Technical Advisor | Robert RIPS |
| Studio | ATP Studios (Ealing) |