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Charles Laughton as Inspector Jules Maigret |
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Franchot Tone as Johann Radek |
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Burgess Meredith as Joseph Heurtin |
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Robert Hutton as Bill Kirby |
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Jean Wallace as Edna Wallace |
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Patricia Roc as Helen Kirby |
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Belita as Gisella Heurtin |
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George Thorpe as Comelieu |
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William Phipps as Janvier |
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William Cottrell as Moers |
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Chaz Chase as Waiter |
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Wilfrid Hyde-White as Professor Grollet |
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Howard Vernon as Inspector (uncredited) |
| Editing | Louis Sackin | Editor |
| Production | Irving Allen | Producer |
| Production | Franchot Tone | Producer |
| Writing | Harry Brown | Screenplay |
| Camera | Stanley Cortez | Director of Photography |
| Directing | Burgess Meredith | Director |
| Writing | Georges Simenon | Novel |
