Ralf Milan, a hitman, arrives in Montpellier to kill an important witness. He checks in a hotel without knowing that his neighbour has become neurotic after his wife left him.
| Writing | Francis Veber | Theatre Play |
| Directing | Édouard Molinaro | Director |
| Production | Alexandre Mnouchkine | Producer |
| Sound | Jacques Brel | Original Music Composer |
| Camera | Raoul Coutard | Director of Photography |
| Editing | Monique Isnardon | Editor |
| Production | Georges Dancigers | Producer |
| Editing | Robert Isnardon | Editor |
| Sound | François Rauber | Original Music Composer |
| Crew | Eric Vasberg | Stunts |
| Art | François de Lamothe | Production Design |
| Art | Jacques Brizzio | Set Decoration |
| Sound | Jean-Louis Ducarme | Sound |
| Sound | Alex Pront | Sound |
| Writing | Francis Veber | Screenplay |
