- David Niven
- 'Major' Bradbury
- Toshirô Mifune
- The Ambassador
- Hardy Krüger
- Muller
- Kazuhito Andô
- Koichi
- Irene Tsu
- Talah
- Ivan Desny
- Foreign Minister
- Miiko Taka
- Madame Kagoyama
- Jeff Corey
- Mr. King
- Patricia Donahue
- Mrs. King
- Ronald Fraser
- Sergeant Forster
- Jeannine Siniscal
- Foreign Minister's Girl
- Kurt Christian
- Harok
- Mika Kitagawa
- Ambassador's Secretary
- Eric Soh
- Pathet
- Salleh Ben Joned
- Sokono
- Mustapha Maarof
- Marco
- Gatz Shariff
- Chief of Police
- Takao Okuyama
- Chargé d'affaires
- David Khoo
- Mok
- Noor Kumalasari
- Ruby
- Rainer Penkert
- Army Colonel
- Tim Moores
- Stapes
- Tony Braun
- T.V. Cameraman
- Paul Neuhaus
- Army Sergeant
- David de Keyser
- Ambassador Kagoyama
- Robert Rietty
- Harok
- Nicole Massie
- Plane passenger / Coach crash victim (uncredited)