Géo Paquet, aka The Gorilla, breaks from jail. Now an escaped convict, the elite agent must infiltrate a dangerous gang working for a foreign embassy as their leader, a spy enjoying diplomatic immunity, can't be arrested by regular police.
| Actor | Role |
|---|---|
 Lino VenturaGéo Paquet, Le Gorille | Géo Paquet, Le Gorille |
 Charles VanelColonel Berthomieu | Colonel Berthomieu |
 Pierre DuxVeslot | Veslot |
 Bella DarviIsolène | Isolène |
 René LefèvreCommissioner Blavet | Commissioner Blavet |
 Robert ManuelCasa | Casa |
 André ValmyMauricet | Mauricet |
 Henri CrémieuxX.A. Pallos | X.A. Pallos |
 Jean-Roger CaussimonLéon | Léon |
 Jean-MaxCouncilor Smolen | Councilor Smolen |
 Jean-Marie RivièreValério | Valério |
 Yves BarsacqBerthier | Berthier |
 François DarbonPopaul | Popaul |
 René BergeronAntoine Legrand, first hygiene inspector | Antoine Legrand, first hygiene inspector |
 Maurice ChevitSecond hygiene inspector | Second hygiene inspector |
| GGuy MairesseKiller | Killer |
 Jacques SeilerPrincipal Inspector Antier | Principal Inspector Antier |
| RRobert BerriCombinat | Combinat |
 Jean-Pierre MockySébut | Sébut |
 Marie SabouretChaboute | Chaboute |
 Jean MercureDirector of the DST | Director of the DST |