La Poison[1][2] is a 1951 French comedy drama film, written and directed by Sacha Guitry, starring Michel Simon with Jean Debucourt and Germaine Reuver.

She hits on rat poison, he, intrigued by a radio interview with a famous lawyer, decides to go to Paris to meet him.

Guitry was determined to have Michel Simon in his film and asked the actor how he could make his participation satisfactory; Simon replied that he wanted only one take for his scenes.

All the sets were constructed in colour but filmed in black and white, in order to play the effect of their shades.

[5] Notably, in a film in which he did not act, the introductory credits take the form of physical introductions and thanks by Guitry to each of the cast, the composer and key technical staff, even many of the extras.