• 
  Esmond Knight

  Stricker
• 
  Christopher Lee

  Brunner - Labor Camp Captain
• 
  George Pravda

  Karewski
• 
  George Pastell

  Eryk
• 
  Michael Rennie (I)

  Stefan
• 
  Carl Jaffe

  General
• 
  Peter Madden

  Stanislaw
• 
  Patricia Medina

  Zofia

• 
  Gertan Klauber

  SS guard - Stefan at Dentist
• 
  Frank Thornton

  British Scientist
• 
  Gordon Sterne

  Margraaf
• 
  Carl Duering

  Scientist
• 
  Jan Conrad

  Wlodek (countryside underground leader)

• 
  Ken Adam

  art department
• 
  John Dark

  production manager

• 
  Douglas Hickox

  second unit director or assist