A judge investigating police corruption finds that the deeper he digs, the more roadblocks he finds.
| Actor | Role |
|---|---|
 Jacques BrelInvestigating Judge Bernard Level | Investigating Judge Bernard Level |
 Catherine RouvelDanièle Lebegue | Danièle Lebegue |
 Paola PitagoraLaura | Laura |
 Charles DennerGraziani | Graziani |
 François CadetRabut | Rabut |
 Roland LesaffreSaugeat | Saugeat |
 Françoise GiretGeneviève Saugeat | Geneviève Saugeat |
 Didier HaudepinFrançois | François |
 Harry-MaxMoulard | Moulard |
 Pierre MaguelonGuardian | Guardian |
 Alain NobisPresident | President |
 Jean-Roger CaussimonCommissioner Lagache | Commissioner Lagache |
 Serge SauvionBenetti | Benetti |
 Boby LapointeLouis Casso | Louis Casso |
 Michael LonsdaleInspector Bertrand | Inspector Bertrand |
 Henri NassietPresident of the Court | President of the Court |
| LLuc PonetteMaître Rivette | Maître Rivette |
 Marius LaureyVéricel | Véricel |
| LLucien BarjonMauvoisins | Mauvoisins |
 Luc MerendaMarco (uncredited) | Marco (uncredited) |
 Jean FranvalSabatier (uncredited) | Sabatier (uncredited) |