• 
  Walter Summers

  regizor

• 
  Edgar Wallace

  scenarist
• 
  Walter Summers

  scenarist

• 
  Bela Lugosi

  Dr. Feodor Orloff
• 
  Hugh Williams

  Det. Insp. Larry Holt
• 
  Greta Gynt

  Diana Stuart
• 
  Wilfred Walter

  Jake
• 
  Alexander Field

  Fred Grogan

• 
  Edmon Ryan

  Lieutenant Patrick O'Reilly

• 
  John Argyle

  producător
• 
  Guy Jones

  coloană sonoră