8
85 min
Fearing the theft of an important secret formula, the scientist Claude Amory asks for help from Monsieur Préval, director of the Sûreté. But when Amory is mysteriously poisoned inside his own home, the detective realizes the case is more serious than he had imagined and decides to investigate each of the suspects.
| Name | Character | Team | |
|---|---|---|---|
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René Alexandre | Préval | Unowned |
| Harry Arbell | Antoine | Unowned | |
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Maxime Desjardins | Claude Amory | Unowned |
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Gaston Dupray | Gaston de Ravennes | Unowned |
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Alice Field | Lucie Stenay | Unowned |
| Maurice Varny | Richard Stenay | Unowned | |
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Danielle Darrieux | Henriette Stenay | Unowned |
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Marcel Vibert | Dr. Carelli | Unowned |
| André Laurent | Raynor | Unowned | |
| Isabelle Anderson | Marthe | Unowned | |
| Jean Laurent | Dr. Dernault | Unowned |