Le fou du labo IV 1967

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, chercheur scientifique, célibataire 

Maria Latour
Régine, l'espionne de monsieur Beauchard 

Bernard Blier
M. Beauchard, secrétaire de direction lié à un gang 

Michel Serrault
M. Granger, directeur du laboratoire scientifique 

Pierre Tornade
l'inspecteur DST 

Pierre Brasseur
le Père Ballanchon 

• The Madman of Lab Four