Other titles: Un pacto con el diablo | Behind the Door | A Reencarnação do Demônio | Espírito Maligno | Le démon aux tripes | Chi Sei? | Poseída por el demonio | El demonio en ella | Poder maléfico | Yhteys tuonpuoleiseen | Beyond the Door | To sperma tou antihristou | Το σπέρμα του αντίχριστου | The Devil Within Her | La cosa è tra noi (Chi sei?) | Diabolica | デアボリカ | ¿Quién eres? | La endemoniada | O Diabo Dentro Dela | I djävulens grepp | Kontrakt med andra sidan | За дверью | Şeytan | За дверима | A Demon Beyond the Door | A Demon Lurks Beyond the Door | Vom Satan gezeugt | Wer bist Du? | Who Are You?
Year Released: 1974
Month released: November
Certification: Argentina:18, Argentina:X, Australia:R, Canada:13+, France:16, Hong Kong:III, Italy:VM14, New Zealand:R18, Norway:16, Sweden:15, United Kingdom:15, United Kingdom:X, United States:R, West Germany:18
Cast: Barbara Fiorini, Carla Mancini, David Colin Jr., Edmund Purdom, Elizabeth Turner, Elizabeth Wieseman, Gabriele Lavia, George Montage, Gino Marturano, Joan Acti, Juliet Mills, Nino Segurini, Richard Johnson, Robert Booth, Vittorio Fanfoni
Additional Crew: Carolyn De Fonseca, Cesare Barbetti, Edward L. Montoro, Ernesto Poli, Giorgio Carlo Rossi, Laura Boccanera, Lydia Simoneschi, Manfredi Marzano, Maria Pia Di Meo, Nando Gazzolo, Pat Starke, Pino Locchi, Riccardo Corti, Sergio Graziani, Ted Rusoff, Vittoria Febbi
Camera and electrical department: Eugenio Raimondi, Franco Bruni, Mario Bagnato, Maurizio Maggi, Maurizio Micalizzi, Roberto Calabró
Certification: Argentina:18, Argentina:X, Australia:R, Canada:13+, France:16, Hong Kong:III, Italy:VM14, New Zealand:R18, Norway:16, Sweden:15, United Kingdom:15, United Kingdom:X, United States:R, West Germany:18
Cinematographers: Roberto D'Ettorre Piazzoli
Colorization: Color
Country: Italy
Distributors: Apex, Arcade Video, Arrow Films, Arrow Video, Astral Video, Baroness, CBS, Cinefear, Code Red DVD, Digital Media Rights, DRagonFLIX, Edko Films, Film Ventures International (FVI), FilmArt, Home Box Office (HBO), International Film Distributors, Media Home Entertainment, Nostalgia Family Video, NSM Records, Produzioni Atlas Consorziate (P.A.C.), Scotia International Filmverleih, Simple Movies, Sinister Cinema, Spaghetti Pictures Italia, Sunset Video, Telefilms Internacional, S.A., Unitalia Films, United Artists, Video Classics, Video Space, Video Treasures, VPS Video
Editors: Angelo Curi
Genre: Horror
Other Companies: CAM Edizioni Musicali, Cine Audio Effects, De Paolis I.N.C.I.R., International Recordings
Script and Continuity Department: Patrizia Zulini
Sound Department: Adolfo Fabrizi, Alvaro Gramigna, Bruno Brunacci, Christopher Cruise, Danilo Sterbini, Fausto Ancillai, Fernando Caso, Roberto Arcangeli
Stunts: Gino Marturano