The Strange Vice of Mrs Wardh

When socialite and heiress Julie Wardh begins receiving blackmail letters attributed to a mysterious serial killer, she suspects her cruel and sadistic former lover Jean is behind them. With her husband Neil frequently out of town, she falls into the arms of her friend's cousin George, and as the unknown assassin begins to make his move, she fears that one of the three men in her life may be the killer.

• 
  Sergio Martino
• 
  Mirella Malatesta
• 
  Francisco Rodríguez
• 
  Vittorio Caronia

• 
  Edwige Fenech
  Julie Wardh
• 
  George Hilton
  George Corro
• 
  Ivan Rassimov
  Jean
• 
  Conchita Airoldi
  Carol Brandt
• 
  Manuel Gil
  Dr. Arbe
• 
  Carlo Alighiero
  Commissioner
• 
  Alberto de Mendoza
  Neil Wardh
• 
  Bruno Corazzari
  The Killer
• 
  Luis de Tejada
  Inspector
• 
  Marella Corbi
  Victim Who Escapes from the Killer
• 
  Miguel del Castillo
  Spanish Doctor
• 
  Brizio Montinaro
  Party Guest
• 
  Pouchi
  Victim in the Shower
• 
  Diomira Vidotto
  Room Maid
• 
  Giuseppe Marrocco
  Neighbor (uncredited)
• 
  Francesco Narducci
  Police Photographer (uncredited)
• 
  Oscar Sciamanna
  Party Guest (uncredited)