• 
  Terence Fisher

  regizor

• 
  Jimmy Sangster

  scenarist

• 
  Peter Cushing

  Dr. Victor Stein
• 
  Francis Matthews

  Dr. Hans Kleve
• 
  Eunice Gayson

  Margaret
• 
  Michael Gwynn

  Karl
• 
  John Welsh

  Bergman
• 
  Lionel Jeffries

  Fritz

• 
  Anna Walmsley

  Vera Barscynska
• 
  George Woodbridge

  Janitor
• 
  Charles Lloyd Pack

  President of the Medical Council
• 
  Michael Ripper

  Kurt
• 
  Alex Gallier

  Priest at Execution
• 
  Michael Mulcaster

  Tattooed Patient
• 
  John Stuart

  Inspector

• 
  Middleton Woods

  Patient
• 
  George Hirste

  Dirty Old Patient
• 
  Arnold Diamond

  Molke
• 
  Marjorie Gresley

  Countess Barscynska (as Margery Gresley)
• 
  Oscar Quitak

  Dwarf
• 
  Richard Wordsworth

  Up Patient