Onder andere met: George Peppard (Lt. John Curtis), Trevor Howard (Professor Lindemann), John Mills (General Boyd), Sophia Loren (Nora), Richard Johnson (Duncan Sandys), Tom Courtenay (Robert Henshaw), Jeremy Kemp (Phil Bradley), Anthony Quayle (Bamford), Lilli Palmer (Frieda), Paul Henreid (General Ziemann), Barbara Rütting (Hannah Reitsch), Patrick Wymark (Prime Minister Winston Churchill)