• 
  William Fairchild

  regizor

• 
  William Fairchild

  scenarist

• 
  Laurence Harvey

  Locotenent Crabb, R.N.V.R.
• 
  Dawn Addams
• 
  Michael Craig
• 
  Gianna Maria Canale
• 
  Nigel Stock

  Able Seaman Fraser
• 
  Ewen Solon

  Willowdale Captain

• 
  Alec McCowen

  Able Seaman Morgan
• 
  Lee Montague

  Miguel's Mate
• 
  Ian MacNaughton

  Sentry outside Admiral's Office
• 
  Howard Marion-Crawford

  Wing Commander
• 
  Derren Nesbitt
• 
  Alan Webb

  British Consul
• 
  Cyril Shaps

  Miguel

• 
  Yvonne Romain

  Spanish Girl
• 
  Sid James

  Chief Petty Officer Thorpe
• 
  Giacomo Rossi-Stuart

  Rosati
• 
  Arnoldo Foà

  Tomolino
• 
  Massimo Serato

  Forzellini