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| Cast |
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| FORMBY, George | George |
| CALVERT, Phyllis | Mary |
| MARSH, Garry | Mendez |
| BRENT, Romney | Slim |
| LEE, Bernard | Neilson |
| BROWNE, Coral | Iris |
| PICKARD, Helena | Mrs Neilson |
| WALSH, Percy | Schwartz, german spy |
| BEAUMONT, Diana | Greta |
| THATCHER, Torin | U-boat commander |
| CALTHROP, Donald | Strickland |
| GORDON, Hal | Arbuckle |
| SCHOFIELD, Johnnie | |
| WATERS, Russell | SS Macaulay radio operator (uncredited) |
| CLUNES, Alec | submarine officer (uncredited) |
| SHINER, Ronald | clarinettist (uncredited) |
| FLEMING, Ian | intelligence officer (uncredited) |
| LIEVEN, Albert | German radio operator (uncredited) |
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| Credits |
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| Director | VARNEL, Marcel |
| Production Companies | Associated Talking Pictures |
| | Ealing Studios |
| Producer | BALCON, Michael |
| Associate Producer | DEARDEN, Basil |
| Unit Manager | PERMANE, Vincent |
| Screenplay | MacPHAIL, Angus |
| | DIGHTON, John |
| | DEARDEN, Basil |
| | MELFORD, Austin |
| Director of Photography | NEAME, Ronald |
| Editor | PITT, Ray |
| Art Director | SHINGLETON, Wilfrid |
| Music/Lyrics | FORMBY, George |
| | GIFFORD, Harry |
| | CLIFFE, Fred E. |
| | LATTA, Eddie |
| Incidental Music | IRVING, Ernest |
| Music Directors | IRVING, Ernest |
| | BIDGOOD, Harry |
| Sound | WILLIAMS, Eric |
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