The bungling inspector Cruchot finds himself trying to save the residents of St. Tropez from some oil-drinking humanoid aliens. The only way to tell the aliens from the real people, besides their constant thirst for oil-products, is that they sound like empty garbage cans when you touch them. Chaos is ahead.

Louis de Funès
as Ludovic Cruchot

Michel Galabru
as Jérôme Gerber

Maurice Risch
as Henri Beaupied

Jean-Pierre Rambal
as Charles Taupin

Guy Grosso
as Gaston Tricard

Michel Modo
as Jules Berlicot

France Rumilly
as Soeur Clotilde

Jean-Roger Caussimon
as L'évêque

Mario David
as Le voleur du bidon d'huile

Jacques François
as Le colonel de gendarmerie