FBI agent John Lewis travels in Europe, from Paris to Lisbon, trying to locate a disappeared fellow secret-agent, Mark Lemoine. Soon he has trouble with a violant gang, and is involved with a young French reporter, Michèle Laurent. Finally, the chief of the Secret Service tells Lewis that Lemoine never existed. Instead of ending his mission there, the real trouble starts.
| Actor | Role |
|---|---|
 Eddie ConstantineJohn Lewis / John Jarvis | John Lewis / John Jarvis |
 Barbara LaageMichèle Laurent | Michèle Laurent |
 Stefan SchnabelBragarian | Bragarian |
 Claude CervalSecret Services Director | Secret Services Director |
 Saro UrzìAlvarez | Alvarez |
| NNorma BurgoHélène | Hélène |
| CClarence WeffKiller | Killer |
 Lucien CallamandNot listed | Not listed |
 Albert MédinaNot listed | Not listed |
 Anny NelsenNot listed | Not listed |
 Jean-Pierre ZolaNot listed | Not listed |