• 
  Anthony Bushell

  regizor
• 
  Reginald Beck

  regizor

• 
  Rex Harrison

  Arthur Groome
• 
  Lilli Palmer

  Mary Groome
• 
  William Squire

  Sgt. Cochran
• 
  Eric Pohlmann

  Mr. Polaris (the mystery witness)
• 
  Lionel Murton

  Jefferson (American publisher) (US version only)
• 
  Anthony Bushell

  Clive Bedford

• 
  Colin Gordon

  Pound
• 
  Michael Medwin

  Leslie Scott
• 
  Denis O'Dea

  Sir Charles Morton
• 
  Reginald Beck
• 
  Brenda De Banzie

  Mrs. Rogers
• 
  Henry B. Longhurst

  Judecător
• 
  Raymond Huntley

  Chief Insp. Sullivan

• 
  Carey Harrison

  Arthur Groome

• 
  Wilkie Cooper

  imagine
• 
  Benjamin Frankel

  departament sunet
• 
  John Glen

  editorial department
• 
  Benjamin Frankel

  music department
• 
  Rex Harrison

  producător
• 
  Carey Harrison

  producător
• 
  Nunnally Johnson

  scriitor