Julien Saint Dominique, an agent of the French counter-espionage service in Berlin, investigates the kidnapping of a functionary taken by German communists into East Germany.
| Actor | Role |
|---|---|
 Roger HaninSaint-Dominique | Saint-Dominique |
 Margaret LeeOlivia | Olivia |
 Peter CarstenGünther | Günther |
 Claude DauphinLasalle | Lasalle |
 Helga SommerfeldIngrid | Ingrid |
 Ivan DesnySteve | Steve |
 Brigitte WentzelFrida | Frida |
 Ennio BalboPapillon | Papillon |
 Edy BiagettiFelix | Felix |
 Giovanna LenziNot listed | Not listed |
 Ugo PagliaiNot listed | Not listed |
| WWaldemar FrahmNot listed | Not listed |
| JJorge RadoNot listed | Not listed |
 Yves BrainvilleNot listed | Not listed |