Léon is hired by a detective agency to monitor a music hall star whose friend is extremely jealous.
| Directing | Joe Francis | Director |
| Writing | Jean-Louis Bouquet | Screenplay |
| Production | Alex Nalpas | Producer |
| Sound | Géo Sundy | Original Music Composer |
| Sound | Georges Tzipine | Original Music Composer |
| Camera | Robert Batton | Director of Photography |
| Camera | Albert Viguier | Director of Photography |
| Sound | Robert Biard | Sound |
| Sound | Tony Leenhardt | Sound |