This talkative and unevenly paced feature finds Fou (Jean Lefebvre) the inventor of a gas that makes the users fall in love. He is chased by his boss, the police, and spies, who seek to secure the secret recipe for their own selfish purposes. A shadowy American underworld figure tries to intimidate the inventor. A half-hearted attempt at comedy tries to go along with the double dealing and trickery of the thin plot of the film.
Is The Madman of Lab Four on Netflix? Unfortunately the movie The Madman of Lab Four is not yet available on Netflix.
| Directing | Jacques Besnard | Director |
| Art | Jacques Martin | Props |
| Art | Henri Sonois | Set Decoration |
| Art | Henri Sonois | Production Design |
| Art | Pierre Charron | Set Decoration |
| Production | Jacques Besnard | Producer |
| Production | Mireille de Tissot | Production Manager |
| Camera | Gilles Baudoin Peytel | Still Photographer |
| Production | Robert Sussfeld | Production Manager |
| Crew | Michel Berreur | Stunts |
| Camera | Michel Lebon | Assistant Camera |
| Writing | Jean Halain | Writer |
| Costume & Make-Up | Billy Bonnard | Key Makeup Artist |
| Writing | René Cambon | Novel |
| Production | Guy Azzi | Production Accountant |
| Camera | Raymond Lemoigne | Director of Photography |
| Directing | Jean-Marie Poiré | Second Assistant Director |
| Production | Alice Bogard | Unit Manager |
| Camera | Daniel Diot | Camera Operator |
| Directing | André Cagnard | Action Director |
| Editing | Colette Lambert | Assistant Editor |
| Crew | Claude Carliez | Stunt Coordinator |
| Production | Armand Tabuteau | Unit Production Manager |
| Directing | Pierre Cosson | Assistant Director |
| Crew | Rico López | Stunts |
| Production | Alain Poiré | Delegated Producer |
| Editing | Gilbert Natot | Editor |
| Writing | Jacques Besnard | Writer |
| Sound | Jean Jak | Boom Operator |
| Sound | René-Christian Forget | Sound |
| Sound | Bernard Gérard | Original Music Composer |