Dominique Sanda

Lou Andreas Salomé

Erland Josephson

Friedrich Nietzsche

Robert Powell

Paul Rée

Virna Lisi

Elizabeth Nietzsche

Michael Degen

Karl Andreas

Elisa Cegani

Franziska Nietzsche

Umberto Orsini

Bernard Foester

Philippe Leroy

Peter Gast

Carmen Scarpitta

Malvida

Nicoletta Machiavelli

Amanda

Amadeo Amodio

Dr. Dulcamara

Elisabeth Wiener

Greta (credited as Elisabeth Winer)

Roberto Bruni

Professor Julius Longbehn

Mircha Carven

Wolfgang

Clara Algranti

Teresa

Robert José Pomper

Young Venetian Gondolier/Christ

Renato Scarpa

Psychiatrist

Francesca Muzio

Maria

Anita Höfer

Prostitute at Station (credited as Anita Hofer)

Heinz Kreuger

University Rector

Vinicio Diamanti

Hélène Beaucour

Madam at Colonia Bordello (uncredited)

Lars Bloch

German Friend (uncredited)

Ritza Brown

Young Sicilian Prostitute (uncredited)

Guido Cerniglia

Guest in Malvida's House (uncredited)

Carlo Colombo

Bonnet (uncredited)

Clara Colosimo

Trude (uncredited)

Geoffrey Copleston

Guest in Malvida House (uncredited)

Elvira Cortese

Maid (uncredited)

Catharina Dahlin

Prostitute (uncredited)

Patrizia Dordi

Professor Staudenmayer's Singer (uncredited)

Jean Dudan

Professor Staudenmayer (uncredited)

Enzo Fabbri

Sick Man in Ambulance (uncredited)

Marina Hedman

Prostitute (uncredited)

Piero Morgia

Young Man in Pub (uncredited)

Julia Sebastian

Aunt Augusta (uncredited)

Dieter Stengel

Left-Wing Militant (uncredited)

Marcella Theodoli

Brothel Madame (uncredited)