A legendary police commissioner is at the edge of writing his memoirs when he asked to help out with solving a locked room mystery where two people are found dead in an apartment that was locked from the inside.
| Actor | Role |
|---|---|
 Jean-Pierre MarielleDarnoncourt | Darnoncourt |
 Fabrice LuchiniSimon | Simon |
 Etienne ChicotMaître Charasse | Maître Charasse |
 Thierry GimenezNot listed | Not listed |