Directed by
| Riccardo Freda | ... | (as Willy Pareto) |
Writing Credits
| Riccardo Freda | ... | (screenplay) (as Willy Pareto) & |
| Sandro Continenza | ... | (screenplay) (as Alessandro Continenza) |
| Günter Ebert | ... | (with the collaboration of) (as Gunther Ebert) |
| Renato Romano | ... | (screenplay) (uncredited) |
| André Tranché | ... | (dialogue) (uncredited) |
| Richard Mann | ... | (novel) |
Cast (in credits order) complete, awaiting verification
| Luigi Pistilli | ... | Detective John Norton | |
| Dagmar Lassander | ... | Helen Sobiesky | |
| Anton Diffring | ... | Ambassador Sobiesky | |
 |
Arthur O'Sullivan | ... | Inspector Lawrence |
| Werner Pochath | ... | Marc Sobiesky (as Werner Pochat) | |
| Dominique Boschero | ... | The Ambassador's mistress | |
| Renato Romano | ... | Mandel | |
| Sergio Doria | ... | Walter | |
|
|
Ruth Durley | ... | Norton's mother |
| Valentina Cortese | ... | Mrs. Sobiesky | |
| Rest of cast listed alphabetically: | |||
|
|
Emmet Bergin | ... | Man in café (uncredited) |
| Niall Toibin | ... | Doctor (uncredited) | |
Produced by
| Robert Dorfmann | ... | co-producer (uncredited) |
| Ennio Nobili | ... | producer (uncredited) |
Music by
| Stelvio Cipriani | ||
Cinematography by
| Silvano Ippoliti | ... | director of photography |
Editing by
| Riccardo Freda | ... | (as Willy Pareto) |
Production Design by
| Giuseppe Chevalier | ... | (as Giuseppe Chevalier Mifsud) |
Art Direction by
| Giuseppe Chevalier | ... | (as Giuseppe Chevalier Mifsud) |
Costume Design by
| Nadia Vitali | ||
Makeup Department
| Lamberto Marini | ... | makeup artist |
Production Management
| Alfonso Donati | ... | production manager |
| Franco Fumagalli | ... | unit manager |
| Fritz Hammel | ... | unit manager |
Second Unit Director or Assistant Director
| Leo Jahn | ... | assistant director |
Sound Department
| Nick Alexander | ... | dubbing editor |
| Aldo De Martino | ... | sound engineer (as Aldo De Martini) |
Camera and Electrical Department
| Renato Doria | ... | assistant camera |
| Ennio Marzocchini | ... | assistant camera |
| Leo Massa | ... | still photographer |
| Mario Mazzoni | ... | still photographer |
| Enrico Sasso | ... | camera operator |
Editorial Department
| Bruno Micheli | ... | assistant editor |
| Gertrud Petermann | ... | assistant editor |
Script and Continuity Department
| Vivalda Vigorelli | ... | continuity |
Additional Crew
| Giuseppe Bruno Bossio | ... | production secretary |
