Fabio Testi character Enrico Rosseni
Karin Baal character Herta Rosseni
Cristina Galbó character Elizabeth Seccles (as Christine Galbo)
Joachim Fuchsberger character Inspector Barth
Günther Stoll character Professor Bascombe
Claudia Butenuth character Brenda Pilchard
Camille Keaton character Solange Beauregard
Maria Monti character Mrs. Erickson
Giancarlo Badessi character Mr. Erickson
Pilar Castel character Janet Bryant
Giovanna Di Bernardo character Helen Edmonds
Vittorio Fanfoni character Enrico's Landlord
Marco Mariani character Father Webber
Antonio Casale character Mr. Newton (as Antony Vernon)
Emilia Wolkowicz character Ruth Holden (as Emilia Wolkowich)
Daniele Micheletti character Mr. Bryant
Antonio Anelli character Father Herbert
Rainer Penkert character Mr. Leach, the Headmaster
Carla Mancini character Susan, a Student
Joe D'Amato character CID Officer w / The Daily Telegraph (uncredited)
John Gayford character Joseph Kane (uncredited)
Alfonso Giganti character Man at Church (uncredited)
Charles Howerton character Phillip Sullivan (voice) (uncredited)
Maria Michi character Brenda's Mother (uncredited)
Alfred Vohrer character Edgar Wallace (voice) (archive footage) (uncredited)
Joe Wadham character Policeman (uncredited)
