Directed by
| Rafael Gil | ||
Writing Credits (in alphabetical order)
| Antonio Abad Ojuel | ... | (adaptation) |
| Antonio Abad Ojuel | ... | (dialogue) |
| Antonio Abad Ojuel | ... | (screenplay) |
| Vicente Blasco Ibáñez | ... | (novel) |
| Rafael Gil | ... | (adaptation) |
| Rafael Gil | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| María Félix | ... | Freyra | |
| Fernando Rey | ... | Ulises / Capitán Ferragut | |
| Guillermo Marín | ... | Von Kramer / Conde Gavelin | |
| José Nieto | ... | Kurt | |
| Juan Espantaleón | ... | Tío Caragón | |
| Porfiria Sanchíz | ... | Doctora Fedelman | |
| Eduardo Fajardo | ... | Capitán | |
| Ángel de Andrés | ... | Toni | |
| Rafael Romero Marchent | ... | Esteban | |
| Nerio Bernardi | ... | Enrico De Paoli | |
| Osvaldo Genazzani | ... | John | |
| Arturo Marín | ... | Jefe tribunal militar | |
| Félix Fernández | ... | Recepcionista hotel | |
| José Franco | ... | Maitre | |
| José Prada | ... | Miembro tribunal | |
 |
Manuel Aguilera | ... | Telegrafista |
| Santiago Rivero | ... | Capitán | |
| Antonio Vilar | |||
| Rest of cast listed alphabetically: | |||
|
|
Teresa Arcos | ... | (uncredited) |
| Francisco Bernal | ... | (uncredited) | |
Produced by
| Cesáreo González | ... | producer |
Music by
| Juan Quintero | ||
Cinematography by
| Alfredo Fraile | ||
Editing by
| José Antonio Rojo | ||
Production Design by
| Enrique Alarcón | ||
Costume Design by
| Humberto Cornejo | ||
| Marbel | ||
| Armando Valdés Peza | ... | co-costume designer |
Makeup Department
| Carmen Martín | ... | makeup artist |
Production Management
| Vicente J. Fayos | ... | production manager |
Second Unit Director or Assistant Director
| Pedro L. Ramírez | ... | assistant director |
| José Luis Robles | ... | assistant director |
Sound Department
| Jaime Torrens | ... | sound editor |
Additional Crew
| Pedro Pablo Ayuso | ... | voice dubbing: Osvaldo Genezzani (uncredited) |
| Eduardo Calvo | ... | voice dubbing (uncredited) |
| Manuel de Juan | ... | voice dubbing (uncredited) |
| Rafael de Penagos | ... | voice dubbing (uncredited) |
| Julio Goróstegui | ... | voice dubbing (uncredited) |
| Ángel Picazo | ... | voice dubbing: Nerio Bernardi (uncredited) |
