There's Going to be a Party (1960) aka Ca va etre ta fete DVD-R

Starring Eddie Constantine, Barbara Laage, Stefan Schnabel, Claude Cerval, Saro Urzi
Directed by Pierre Montazel
Print: Black and White
Runtime: 90 min
Genre: Action/Adventure
Language: French with English subtitles

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.