A bus conductor gets dressed for work in the morning, goes to the toilet, where he is killed by a bomb. The Commissioner and his fat, bumbling assistant, Inspector Charbonnier are put on the case. After interviewing friends, wives, colleagues, and spying on strangers who might be connected, our heroes trace the assassin down to a mental institution where, it seems, the murder victim has been an inmate for the last three years...
as L'inspecteur Charbonnier
as Le commissaire Pichard
as Gazul
as Gwendoline
as René
as Barbocelli
as Joseph Ordure
as La mère du médecin
as L'entraîneur
as Odette Jeandrin
as Le psychiatre
as Mme Piazzorossicelli
as Le majordome
as Le boxeur
as Angelo
as Rose
as Le joueur d'orgue de barbarie
as Le concierge
as un inspecteur (uncredited)
