Van Heflin (Reger)
Charles Laughton (Adm. Russell)
Mylène Demongeot (Zizi)
John Ericson (Krueger)
Cecil Parker (Col. Howard)
Helmut Schmidt
Umberto Spadaro
Ralph Truman (Adm. Benson)
Gian Maria Volontè (Braun)
Geronimo Meynier
John Lee
Gregoire Aslan (Master of Abdullah)
Corrado Pani
Walter Barnes
Peter Carsten (Lt. Mohr)
Booth Colman
Eleonora Rossi-Drago (Sara)
Dieter Eppler (Dr. Hartmann)
Brendan Fitzgerald
Philo Hauser (Clown)
Gerard Herter
Moira Orfei
Folco Lulli (Paco)
Alex Nicol (Knoche)
Liam Redmond (Windsor)