• 
  Charles Laughton

  Admiral Russell
• 
  Van Heflin

  Captain Bernhard Rogge
• 
  Philo Hauser

  Clown
• 
  Walter Barnes
• 
  Gian Maria Volonte

  Samuel Braunstein
• 
  Liam Redmond

  Windsor
• 
  John Ericson

  Krüger
• 
  Booth Colman

• 
  Peter Carsten

  Lt. Mohr
• 
  Folco Lulli

  Paco
• 
  Mylène Demongeot

  Zizi
• 
  Grégoire Aslan

  Master of Abdullah
• 
  Eleonora Rossi Drago

  Elsa
• 
  Guido Celano
• 
  Gerard Herter

  Cap. del Sommergibile

• 
  Corrado Pani

  Marinaio tedesco
• 
  Dieter Eppler

  Dr. Hartmann
• 
  Cecil Parker

  Col. Howard
• 
  Umberto Spadaro

  Telegrafista