• 
  Christopher Lee

  Dr. Neumann
• 
  Anton Diffring

  Joseph Brezina
• 
  Robert Bray

  Maj. Shane
• 
  Carl Jaffe

  Prof. Stefan Toller
• 
  Karel Stepanek

  Mayor Friederich Sudermann
• 
  Donald Wolfit

  Col. Charles Price
• 
  John Van Eyssen

  Lt. Bobby Grant

• 
  Herbert Smith

  art director