• 
  Lew Landers

  regizor

• 
  Randall Faye

  scenarist
• 
  Griffin Jay

  scenarist

• 
  Bela Lugosi

  Armand Tesla / Dr. Hugo Bruckner
• 
  Frieda Inescort

  Lady Jane Ainsley
• 
  Nina Foch

  Nicki Saunders
• 
  Miles Mander

  Sir Frederick Fleet
• 
  Roland Varno

  John Ainsley

• 
  Matt Willis

  Andreas Obry
• 
  Gilbert Emery

  Dr. Walter Saunders
• 
  Leslie Denison

  Det. Lynch
• 
  Olaf Hytten

  Ben (Lady Jane's butler)
• 
  Jean Bates

  Miss Norcutt (first victim)
• 
  Ottola Nesmith

  Elsa (governess)

• 
  Sam White

  producător

• 
  L. William O'Connell

  imagine
• 
  Paul Borofsky

  montaj
• 
  Mario Castelnuovo-Tedesco

  coloană sonoră