The Fifth Cord

Franco Nero

Andrea Bild

Silvia Monti

Helene Volta

Wolfgang Preiss

Police inspector

Edmund Purdom

Edouard Vermont

Rossella Falk

Sophia Bini

Renato Romano

Dr. Richard Bini

Guido Alberti

Traversi

Luciano Bartoli

Walter Auer

Agostina Belli

Giulia Soavi

Maurizio Bonuglia

John Lubbock

Pamela Tiffin

Lu Auer

Corrado Gaipa

Editor

Andrea Scotti

Vogel

Ira von Fürstenberg

Isabel Lancia

Luigi Antonio Guerra

Man

Irio Fantini

Man

Michel Barnes

Tony Volta (uncredited)

Jean-Pierre Clarain

Journalist in Bini's Home (uncredited)

Alfonso Giganti

Silvester party guest (uncredited)

Nando Sarlo

Man in Black Tie (uncredited)