A meek, mild-mannered man begins to suspect that his beautiful wife is poisoning him after he realizes that his acute stomach aches occur only after he eats at home. As a result, he investigates the death of his predecessor-- his wife's first husband.
You can now watch L'escalier de fer online on the following streaming providers in the United States.
| Directing | Denis Malleval | Director |
| Writing | Jacques Santamaria | Writer |
| Writing | Georges Simenon | Novel |
| Sound | Jean Musy | Original Music Composer |
| Camera | Philippe Pavans de Ceccatty | Director of Photography |
| Editing | Elisabeth Guido | Editor |
| Production | Fabienne Bichet | Casting |
| Production | Jean-Baptiste Neyrac | Producer |
| Production | John Simenon | Associate Producer |
