• 
  Alfred Hitchcock

  regizor

• 
  Charles Bennett

  scenarist

• 
  Sylvia Sidney

  Doamna Verloc
• 
  Oskar Homolka

  Karl Anton Verloc
• 
  Desmond Tester

  Steve
• 
  Joyce Barbour

  Renee
• 
  S.J. Warmington

  Hollingshead
• 
  William Dewhurst

  Profesorul

• 
  Peter Bull

  Michaelis - Conspirator
• 
  Hal Gordon

  Rol de o replică
• 
  Frank Atkinson

  Rol de o replică
• 
  John Loder

  Detective Sergeant Ted Spencer
• 
  Martita Hunt

  Miss Chatham - The Professor's Daughter
• 
  Arnold Bell

  rol minor
• 
  Matthew Boulton

  Superintendent Talbot

• 
  Charles Hawtrey

  Studious Youth at the Aquarium
• 
  Aubrey Mather

  W. Brown & Sons Greengrocer
• 
  Torin Thatcher

  Yunct - Conspirator