Sophia Loren character Nora
George Peppard character Lt. John Curtis
Trevor Howard character Professor Lindemann
John Mills character General Boyd
Richard Johnson character Duncan Sandys
Tom Courtenay character Robert Henshaw
Jeremy Kemp character Phil Bradley
Anthony Quayle character Bamford
Lilli Palmer character Frieda
Paul Henreid character General Ziemann
Helmut Dantine character General Linz
Barbara Rütting character Hannah Reitsch
Richard Todd character Wing Cmdr. Kendall
Sylvia Syms character Constance Babington Smith
John Fraser character Flight Lt. Kenny
Maurice Denham character RAF Officer
Patrick Wymark character Prime Minister Winston Churchill
Wolf Frees character German Police Inspector
Moray Watson character Col. Kenneth Post
Richard Wattis character Sir Charles Sims
Allan Cuthbertson character German Technical Examiner
Karel Stepanek character Prof. Hoffer
Milo Sperber character German Hotel Porter
Robert Brown character Air Commodore
Ferdy Mayne character German Officer
George Mikell character German Officer
Anton Diffring character SS Sturmbannfuhrer
Philip Madoc character German Police Officer
John Abineri character German Policeman
Charles Lloyd Pack character Technical Examiner
William Mervyn character Dutch Technical Examiner
Gertan Klauber character Soldier at Rocket Plant
Jeremy Spenser character SS Officer at Rocket Plant
John Ronane character RAF Dakota Pilot
