Other titles: Os Monstros do Terror | Assignment Terror | Dracula contre Frankenstein | Frankenstein og blodsugerne | El hombre que vino de Ummo | Reincarnator | Dracula Versus Frankenstein | I symmoria tou Drakoula | Η συμμορία του Δράκουλα | Operazione terrore | Monster Panic: Strange Tactics | Monsutâ Panikku/Kaiki sakusen | Operación terror | Varulven jagar Frankenstein | Ужасные монстры | Dracula vs. Frankenstein | Dracula jagt Frankenstein | Operation Terror | The Man Who Came from Ummo
Year Released: 1970
Month released: February
Writers: Paul Naschy
Cast: Ángel del Pozo, Craig Hill, Diana Sorel, Fajda Nicol, Ferdinando Murolo, Gela Geisler, Gene Reyes, Karin Dor, Luciano Tacconi, Manuel de Blas, Maria Perschy, Michael Rennie, Patty Shepard, Paul Cross, Paul Naschy, Peter Damon, Robert Hall, Walter Kraus
Production Companies: Eichberg-Film, International Jaguar Cinematografica, Producciones Jaime Prades
Additional Crew: Almut Eggert, Antonio Fernández, Arsenio Corsellas, Beate Hasenau, Consuelo Vives, Dionisio Macías, Eduardo Muntada, Elsa Fábregas, Enriqueta Linares, Felip Peña, Friedrich W. Bauschulte, Gert Günther Hoffmann, Glòria Roig, Heinz Petruo, Jaime D'Ors, Joachim Cadenbach, Joachim Nottke, Jose F. Labrador, José Luis Sansalvador, José María Ricarte, Josep Maria Angelat, Juan Antolín, Karlheinz Brunnemann, Manuel Cano, María Luisa Solá, Marianne Lutz, Martin Hirthe, Peter Riethof, Rafael Luis Calvo, Rogelio Hernández, Rolf Schult, Rosa Guiñón, Ursula Herwig, Wilhelm Borchert
Cinematographers: Godofredo Pacheco
Colorization: Color
Distributors: American-International Television (AIP-TV), Artus films, Castilla Films, Cobb Films, Code Red DVD, Columbia-Bavaria Filmgesellschaft m.b.H., Europrodis, FilmArt, Gemini Entertainment, Gemstone Entertainment, Morava Film, Octavio Morella Cardona, Pallas Film, Scorpion Releasing, Sinister Cinema, Tubi TV, United American Video, Vídeo Mercury Films
Editors: Emilio Rodríguez
Languages: Spanish
Makeup Department: Francisco Ramón Ferrer
Set Decorators: Adolfo Cofiño
Special Effects: Antonio Molina