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.
Le Fou du labo 4
Released
French
Eugène Ballanchon, scientific researcher, single
Régine, Mr. Beauchard's spy
Mr. Beauchard, executive secretary linked to a gang
Mr. Granger, director of the scientific laboratory
DST inspector
Father Ballanchon
Mrs. Ballanchon, Eugène's mother
Merchant, spy in the laboratory
Mario
Scholar