The Madman of Lab Four

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.

Cast

Jean Lefebvre

Eugène Ballanchon, scientific researcher, single

Maria Latour

Régine, Mr. Beauchard's spy

Bernard Blier

Mr. Beauchard, executive secretary linked to a gang

Michel Serrault

Mr. Granger, director of the scientific laboratory

Pierre Tornade

DST inspector

Pierre Brasseur

Father Ballanchon

Margo Lion

Mrs. Ballanchon, Eugène's mother

Robert Dalban

Merchant, spy in the laboratory

Mario David

Mario

Henri Virlogeux

Scholar