A hapless orchestra player becomes an unwitting pawn of rival factions within the French secret service after he is chosen as a decoy by being identified as a super secret agent.
Pierre Richard
François Perrin
Bernard Blier
Colonel Bernard Milan
Jean Rochefort
Colonel Louis Toulouse
Mireille Darc
Christine
Paul Le Person
Perrache
Jean Carmet
Maurice Lefebvre, Perrin's best friend
Colette Castel
Paulette Lefebvre
Maurice Barrier
Chaperon, Toulouse agent
