 Fabio TestiEnrico Rosseni | Enrico Rosseni |
 Karin BaalHerta Rosseni | Herta Rosseni |
 Cristina GalbóElizabeth Seccles | Elizabeth Seccles |
 Joachim FuchsbergerInspector Barth | Inspector Barth |
 Günther StollProfessor Bascombe | Professor Bascombe |
 Claudia ButenuthBrenda Pilchard | Brenda Pilchard |
 Camille KeatonSolange Beauregard | Solange Beauregard |
 Maria MontiMrs. Erickson | Mrs. Erickson |
 Giancarlo BadessiMr. Erickson | Mr. Erickson |
 Pilar CastelJanet Bryant | Janet Bryant |
 Giovanna Di BernardoHelen Edmonds | Helen Edmonds |
 Vittorio FanfoniEnrico's Landlord | Enrico's Landlord |
| MMarco MarianiFather Webber | Father Webber |
 Antonio CasaleMr. Newton | Mr. Newton |
| EEmilia WolkowiczRuth Holden | Ruth Holden |
| DDaniele MichelettiMr. Bryant | Mr. Bryant |
 Antonio AnelliFather Herbert | Father Herbert |
 Rainer PenkertMr. Leach, the Headmaster | Mr. Leach, the Headmaster |
 Carla ManciniSusan, a Student | Susan, a Student |
 Joe D'AmatoCID Officer w / The Daily Telegraph (uncredited) | CID Officer w / The Daily Telegraph (uncredited) |
| JJohn GayfordJoseph Kane (uncredited) | Joseph Kane (uncredited) |
 Alfonso GigantiMan at Church (uncredited) | Man at Church (uncredited) |
 Charles HowertonPhillip Sullivan (voice) (uncredited) | Phillip Sullivan (voice) (uncredited) |
 Maria MichiBrenda's Mother (uncredited) | Brenda's Mother (uncredited) |
 Alfred VohrerEdgar Wallace (voice) (archive footage) (uncredited) | Edgar Wallace (voice) (archive footage) (uncredited) |
| JJoe WadhamPoliceman (uncredited) | Policeman (uncredited) |
 Augusta Di VincenziWoman in church (uncredited) | Woman in church (uncredited) |
| RRory MacDonaldPhillip Sullivan (uncredited) | Phillip Sullivan (uncredited) |
