Directed by
| Tulio Demicheli | ... | (as Tulio Demichelli) |
| Hugo Fregonese | ... | (uncredited) |
| Antonio Isasi-Isasmendi | ... | (finished) (uncredited) |
| Eberhard Meichsner | ... | (uncredited) |
Writing Credits
| Paul Naschy | ... | (story and screenplay) (as Jacinto Molina Alvarez) |
Cast (in credits order) complete, awaiting verification
| Michael Rennie | ... | Dr. Odo Warnoff | |
| Karin Dor | ... | Maleva Kerstein | |
| Craig Hill | ... | Inspector Henry Toberman | |
| Patty Shepard | ... | Ilsa Sternberg (as Patty Sheppard) | |
| Ángel del Pozo | ... | Dr. Kerian Werner (as Angel Del Pozo) | |
| Paul Naschy | ... | Waldemar Daninsky (as Paul Naschi) | |
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Gela Geisler | ... | Ilona (as Ella Gessler) |
| Manuel de Blas | ... | Count Janos de Mialhoff (as Manuel De Blas) | |
| Peter Damon | ... | Judge Sternberg | |
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Diana Sorel | ... | Library Receptionist |
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Ferdinando Murolo | ... | El monstruo de Farancksalan / Frankenstein Monster |
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Luciano Tacconi | ... | Carnival Exhibit Owner |
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Gene Reyes | ... | Tao-Tet - The Mummy |
| Paul Cross | ... | Dr. Don Uno | |
| Rest of cast listed alphabetically: | |||
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Robert Hall | ... | Commissioner Gluck (uncredited) |
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Walter Kraus | ... | Sekretär (uncredited) |
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Fajda Nicol | ... | (uncredited) |
| Maria Perschy | ... | Maleva Kerstein (rehearsed only) (uncredited) | |
Produced by
| Victor Tarruella Lacour | ... | associate producer |
| Jaime Prades | ... | producer |
Music by
| Franco Salina | ||
| Rafael Ferrer-Fitó | ... | (uncredited) |
Cinematography by
| Godofredo Pacheco | ||
Editing by
| Emilio Rodríguez | ||
Set Decoration by
| Adolfo Cofiño | ... | (as Adolfo Cofino) |
Makeup Department
| Francisco Ramón Ferrer | ... | makeup artist (as Francisco R. Ferrer) |
Production Management
| Luis M. Caceres | ... | production supervisor |
| Jesús Narro | ... | production manager (as Jesus Narro) |
| Ramón Plana | ... | production manager (as Ramon Plana) |
Second Unit Director or Assistant Director
| Jaime D'Ors | ... | assistant director |
Special Effects by
| Antonio Molina | ... | special effects |
Camera and Electrical Department
| Ricardo Andreu | ... | camera operator |
| Fernando Espiga | ... | camera operator |
Editorial Department
| Angela Grau | ... | assistant editor |
Additional Crew
| Jaime D'Ors | ... | production assistant |
| Jose F. Labrador | ... | production administrator |
| José María Ricarte | ... | production coordinator (as Jose Ma Ricarte) |
| Josep Maria Angelat | ... | voice dubbing: Peter Damon (spanish version) (uncredited) |
| Juan Antolín | ... | voice dubbing (spanish version) (uncredited) |
| Friedrich W. Bauschulte | ... | voice dubbing: Peter Damon (german version) (uncredited) |
| Wilhelm Borchert | ... | voice dubbing: Michael Rennie (german version) (uncredited) |
| Karlheinz Brunnemann | ... | voice dubbing: Ángel del Pozo (german version) (uncredited) |
| Joachim Cadenbach | ... | voice dubbing: Barkeeper (german version) (uncredited) |
| Rafael Luis Calvo | ... | voice dubbing: Michael Rennie (spanish version) (uncredited) |
| Manuel Cano | ... | voice dubbing: Craig Hill (spanish version) (uncredited) |
| Arsenio Corsellas | ... | voice dubbing (spanish version) (uncredited) |
| Almut Eggert | ... | voice dubbing: Patty Shepard (german version) (uncredited) |
| Antonio Fernández | ... | voice dubbing (spanish version) (uncredited) |
| Elsa Fábregas | ... | voice dubbing (spanish version) (uncredited) |
| Rosa Guiñón | ... | voice dubbing: Patty Shepard (spanish version) (uncredited) |
| Beate Hasenau | ... | voice dubbing: Karin Dor (german version) (uncredited) |
| Rogelio Hernández | ... | voice dubbing: Ángel del Pozo (spanish version) (uncredited) |
| Ursula Herwig | ... | voice dubbing: Gela Geisler (german version) (uncredited) |
| Martin Hirthe | ... | voice dubbing: Robert Hall (german version) (uncredited) |
| Gert Günther Hoffmann | ... | voice dubbing: Craig Hill (german version) (uncredited) |
| Enriqueta Linares | ... | voice dubbing (spanish version) (uncredited) |
| Marianne Lutz | ... | voice dubbing: Diana Sorel (german version) (uncredited) |
| Dionisio Macías | ... | voice dubbing: Paul Naschy (spanish version) (uncredited) |
| Eduardo Muntada | ... | voice dubbing (spanish version) (uncredited) |
| Joachim Nottke | ... | voice dubbing: Computervoice (german version) (uncredited) |
| Heinz Petruo | ... | voice dubbing: Showman (german version) (uncredited) |
| Felip Peña | ... | voice dubbing (spanish version) (uncredited) |
| Peter Riethof | ... | voice dubbing (english version) (uncredited) |
| Glòria Roig | ... | voice dubbing (spanish version) (uncredited) |
| José Luis Sansalvador | ... | voice dubbing: Luciano Tacconi (spanish version) (uncredited) |
| Rolf Schult | ... | voice dubbing: Paul Naschy (german version) (uncredited) |
| María Luisa Solá | ... | voice dubbing: Karin Dor (spanish version) (uncredited) |
| Consuelo Vives | ... | voice dubbing: Helga Geissler (spanish version) (uncredited) |