Directed by
| Benito Perojo | ||
Writing Credits
| Miguel Mihura | ... | (original story) |
Cast (in credits order)
| Niní Marshall | ... | Niní / agenteX25 / Carmiña / Surabaya | |
| Virgilio Teixeira | ... | Richard / Tte. Jorjof | |
| Rafael Calvo | ... | Bonnard - jefe servicios secretos | |
| Francisco Pierrá | ... | Durand | |
| Ramón Martori | ... | Renoir | |
| Rosita Valero | ... | Carmela | |
| Xan das Bolas | ... | Don Cosme Fernández | |
| Rafael Bardem | ... | Gerente del hotel polaco (as Rafael Barden) | |
| Manuel Requena | ... | Mozo | |
| Matilde Muñoz Sampedro | ... | Señora en restaurante (as Matilde Muñoz San Pedro) | |
| Julia Caba Alba | ... | Mujer en el tren (as Julia Cava Alba) | |
| Manuel de Juan | ... | Worsikoff | |
| Fernando Aguirre | ... | Basilio | |
| Roberto Font | ... | Michel | |
| Trini Montero | ... | Princesa Jesusa | |
 |
Pepito Goyanes | ... | Niño espía X110 |
| Rest of cast listed alphabetically: | |||
| Marisa de Leza | ... | Corista (uncredited) | |
|
|
José Durantes | ... | (uncredited) |
| Arturo Marín | ... | Hombre del queso (uncredited) | |
| Rafael Romero Marchent | ... | (uncredited) | |
| Rosario Royo | ... | Doña Rosa (uncredited) | |
|
|
Manuel San Román | ... | Señor X (uncredited) |
Produced by
| Benito Perojo | ... | producer |
| Manuel Rosellón | ... | producer |
Music by
| Juan Quintero | ||
Cinematography by
| Manuel Berenguer | ||
Editing by
| María Paredes | ... | (as Maruja Paredes) |
Set Decoration by
| Sigfrido Burmann | ... | (as Burmann) |
Makeup Department
| Francisco Puyol | ... | hair stylist (as Puyol) / makeup artist |
Production Management
| Miguel Tudela | ... | production manager |
Second Unit Director or Assistant Director
| Armando Moreno | ... | assistant director |
| José María Ramos | ... | second assistant director (as Jose Mª Ramos) |
Art Department
| Francisco Rodríguez Asensio | ... | construction coordinator (as Fco. R. Asensio) |
Sound Department
| Antonio Alonso | ... | sound technician |
| León Lucas de la Peña | ... | sound engineering director (as L. Lucas de la Peña) |
Camera and Electrical Department
| Valentín Javier | ... | still photographer |
| Félix Mirón | ... | camera operator |
| Jesús Rosellón | ... | assistant camera (as Jesús Roselión) |
Script and Continuity Department
| Carmen Pageo | ... | script supervisor |
Additional Crew
| Ángel Tudela | ... | production secretary |
| Rafael Arcos | ... | voice dubbing: Virgilio Teixeira (uncredited) |