Directed by
| Eugenio Martín | ||
Writing Credits (in alphabetical order)
| Giuseppe Mangione | ||
| Eugenio Martín | ... | (screenplay) |
| Gabriel Moreno Burgos | ... | (screenplay) |
| Gabriel Moreno Burgos | ... | (story) |
| Francis Niewal | ... | (screenplay: German version) |
| Gerhard Schmidt | ... | (screenplay: German version) |
Cast (in credits order)
| Jean Sorel | ... | Erik Stein | |
| Götz George | ... | Chris Kronberger | |
| Heinz Drache | ... | Inspector Kaufmann | |
| Georgi Georgiev-Getz | ... | Unknown | |
| Margot Trooger | ... | Katharina | |
| Werner Peters | ... | Inspector | |
| Mara Cruz | ... | Karin Kronberger | |
| Massimo Serato | ... | Georg von Cramer | |
| Eleonora Rossi Drago | ... | Magda Berger | |
| Guido Celano | ... | Tony | |
| Michael Cramer | ... | Pablo | |
 |
Ana María Montaner | ... | Loren |
| José María Caffarel | ... | Psychiatrist | |
|
|
Diana Rabito | ... | Nurse |
|
|
José Villasante | ... | Martias |
|
|
Antonio Queipo | ... | Doctor |
| Antonio Casas | ... | Doctor | |
| Jacinto San Emeterio | ... | Instructor | |
|
|
Hildegarde Neff | ||
| Rest of cast listed alphabetically: | |||
|
|
Pedro Fenollar | ... | Doctor |
| Hildegard Knef | |||
Produced by
| Alfons Carcasona | ... | producer |
Music by
| Francesco De Masi | ||
| Angelo Francesco Lavagnino | ||
| Roman Vlad | ||
Cinematography by
| Francisco Sempere | ||
Editing by
| Antonio Gimeno | ||
| Edith von Seydewitz | ... | (German version) |
Production Design by
| Ramiro Gómez | ||
Costume Design by
| Vittorio Rossi | ||
Makeup Department
| Thea Boggiatto | ... | makeup artist |
Production Management
| Eduardo de la Fuente | ... | production manager |
| Giancarlo Sambucini | ... | production manager |
| Michele Scaglione | ... | general manager |
| Primitivo Álvaro | ... | production supervisor |
Second Unit Director or Assistant Director
| Lore Meyer-Döhner | ... | assistant director |
Sound Department
| Fausto Ancillai | ... | sound engineer |
Camera and Electrical Department
| Ruggero Faido | ... | camera operator |
Script and Continuity Department
| Gabriella Rossetto | ... | script supervisor |
Additional Crew
| Remo Rigirozzi | ... | production secretary |
| Michael Chevalier | ... | voice dubbing: Jean Sorel (uncredited) |
| Ursula Herwig | ... | voice dubbing: Mara Cruz (uncredited) |
| Benno Hoffmann | ... | voice dubbing: José Villasante (uncredited) |
| Gisela Reißmann | ... | voice dubbing: Eleonora Rossi Drago (uncredited) |
| Carlos Werner | ... | voice dubbing: Massimo Serato (uncredited) |
