Roger Moore as Lord Brett Sinclair

Tony Curtis as Danny Wilde

Laurence Naismith as Judge Fulton

Terence Morgan as Carl Foster

Imogen Hassall as Maria

Alex Scott as Coley

Michael Godfrey as Dupont

Neal Arden as Inspector Flavel

Joan Collins as Sidonie

Robert Hutton as Frank Rocco

Robert Rietti as Torino

Ian Thompson as Vasile

Ferdy Mayne as Count Sangallo

Jean Marsh as Nicola

Arnold Diamond as Brusati