A Flora Film production 
Directors : Lucio Fulci, Bruno Mattei [uncredited], Claudio Fragasso [uncredited]
Screenplay : Claudio Fragasso, Rossella Drudi [uncredited]
Cinematography : Riccardo Grassetti
Editor : Alberto Moriani
Music : Stefano Mainetti

Producer : Franco Gaudenzi – Special effects make-up : Franco Di Girolamo – Art direction : Bartolomeo Scavia – Stunt coordinator : Ottaviano Dell’Acqua – Production supervisor : Manrico Passerotti – Accountant : Maria Spera – Production secretary : Angelo Cavello – Camera operatore : Luigi Ciccarese – Continuity : Camilla Fulci, Liliana Ginanneschi – Assistants camera : Mauro di Croce, Raul Filippo Mattei – Make-up : Angela Raffaldi – Sound : Maurizio Miani, Mauro di Croce – Boom operator : Claudio Paolucci – First assistant editor : Lorenzo Costantini – Second assistant editor : Cinzia Mattei – Props : Giuseppe Carrozza, Antonio Arcai – Key grips : Carlo Cascioli, Vittorio Chessari – Gaffer : Umberto Chessari – Songs : Umble Down, The Sound of Fear, Slow Think, Nature – written by Zac and Stefano Mainetti – sung by Clue in the crew – recorded at Yeah Studios – Sound engineer : Davide Piccini – Sound effects : Tullio Arcangeli, Roberto Sterbini, Gjika Sotir – Sound recording : N.C. Roma – Re-recording : C.D.C.  – Mixage : Bruno Monreal – Production equipment : E.C.E. Technovision srl – Coluur : Technicolor – Titles : Stefano Mafera –

With : Deran Sarafian (Kenny), Beatrice Ring (Patricia), Richard Raymond (Roger),  Alex McBride (Bo), Ulli Reinthaler (Nancy), Marina Loi (Carole), Deborah Bergamini (Lia), Alan Collins (plant director), Mike Monty (General Morton), Rene Abadeza (zombie), Mari Catotiengo (Suzanne), Roberto Dell’ Acqua (zombie), Claudio Fragasso (soldier at creamatorum), Robert Marius (Docteur Holder), Bruno Mattei (soldier at creamatorum)