Fabio Testi

Enrico Rosseni

Karin Baal

Herta Rosseni

Cristina Galbó

Elizabeth Seccles (as Christine Galbo)

Joachim Fuchsberger

Inspector Barth

Günther Stoll

Professor Bascombe

Claudia Butenuth

Brenda Pilchard

Camille Keaton

Solange Beauregard

Maria Monti

Mrs. Erickson

Giancarlo Badessi

Mr. Erickson

Pilar Castel

Janet Bryant

Giovanna Di Bernardo

Helen Edmonds

Vittorio Fanfoni

Enrico's Landlord

Marco Mariani

Father Webber

Antonio Casale

Mr. Newton (as Antony Vernon)

Emilia Wolkowicz

Ruth Holden (as Emilia Wolkowich)

Daniele Micheletti

Mr. Bryant

Antonio Anelli

Father Herbert

Rainer Penkert

Mr. Leach, the Headmaster

Carla Mancini

Susan, a Student

Joe D'Amato

CID Officer w / The Daily Telegraph (uncredited)

John Gayford

Joseph Kane (uncredited)

Alfonso Giganti

Man at Church (uncredited)

Charles Howerton

Phillip Sullivan (voice) (uncredited)

Maria Michi

Brenda's Mother (uncredited)

Alfred Vohrer

Edgar Wallace (voice) (archive footage) (uncredited)

Joe Wadham

Policeman (uncredited)

Augusta Di Vincenzi

Woman in church (uncredited)

Rory MacDonald

Phillip Sullivan (uncredited)