Henri Vidal
Francis Coplan
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The blueprints of an aeroplane built from an ultra-secret metal are stolen from national security. French secret service agent Walder believes that the documents are now in Switzerland, in the hands of a man named Lindbaum. The latter agrees to hand over the blueprints in return for a large sum of money. Another agent, Francis Coplan, is sent to Switzerland to handle the deal, but Lindbaum only has half of the documents because he was double-crossed by Kalpannen, an international crook. With the help of Heidi, a Swiss correspondent, Coplan sets out to identify the members of Kalpannen’s gang, only to find that they have all been murdered…
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| Release Date | 1957-03-15 |
|---|---|
| Runtime | 1h 40m |
| Directors | Maurice Labro, Jean Lehérissey |
| Producers | Alain Poiré, François Chavane, Roger Ribadeau-Dumas |
| Writer |
