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.
Is The Lackered Box on Netflix? Unfortunately the movie The Lackered Box is not yet available on Netflix.
| Writing | H. Fowler Mear | Screenplay |
| Writing | Pierre Maudru | Dialogue |
| Directing | Jean Kemm | Director |
| Writing | Agatha Christie | Novel |
| Sound | Henri Verdun | Music |
| Camera | Paul Cotteret | Director of Photography |
| Writing | Brock Williams | Screenplay |
