| Assistant Camera | Renato Palmieri |
| Assistant Director | Alessandro Metz |
| Assistant Editor | Giuseppe Romano |
| Boom Operator | Franco Borni |
| Camera Operator | Elio Polacchi |
| Cast | Robert Hoffmann (as Christian Bauman), Suzy Kendall (as Barbara), Ivan Rassimov (as Fritz Bauman), Adolfo Lastretti (as Tatum, The Killer), Franco Silva (as Luca), Mario Erpichini (as Alex), Maria Pia Conte (as Xenia), Luigi Antonio Guerra (as Boy - In The 'Incipit'), Rosita Torosh (as Woman In Car), Monica Monet (as Clorinda), Guido Alberti (as Malcolm), Bruno Alias (as Party Guest (uncredited)), Nestore Cavaricci (as Police Inspector (uncredited)), Raniero Dorascenzi (as Man In Asylum In 8mm Film Footage (uncredited)), Tom Felleghy (as Christian And Fritz's Father (uncredited)), Giuseppe Marrocco (as Man In Asylum In 8mm Film Footage (uncredited)) |
| Continuity | Marisa Calia |
| Costume Design | Silvio Laurenzi |
| Costumes | Silvio Laurenzi |
| Director | Umberto Lenzi |
| Director Of Photography | Guglielmo Mancori |
| Film Editor | Eugenio Alabiso |
| Hair Stylist | Anna Graziosi |
| Make-up Artist | Pierantonio Mecacci |
| Music | Ennio Morricone |
| Music Arranger | Ennio Morricone |
| Producer | Ugo Tucci |
| Production Designer | Giacomo Calò Carducci |
| Production Secretary | Valerio Zecca |
| Unit Manager | Stefano Pegoraro |
| Voice Dubbing (English Version) | Carolyn De Fonseca (as (uncredited)), Frank von Kuegelgen (as (uncredited)) |
| Writer (Screenplay) | Pino Boller, Massimo Franciosa, Umberto Lenzi, Luisa Montagnana |
| Writer (Story) | Pino Boller |
| Links | http://www.imdb.com/title/tt0072196 · https://www.grindhousedatabase.com/index.php/Spasmo |
