Characters played by Hugh O'Brian
Hugh Lombard
Characters played by Shirley Eaton
Ann Clyde
Characters played by Fabian
Mike Raven
Characters played by Leo Genn
General Mandrake
Characters played by Stanley Holloway
William Blore
Characters played by Wilfrid Hyde-White
Judge Cannon
Characters played by Daliah Lavi
Ilona Bergen
Characters played by Dennis Price
Dr. Armstrong
Characters played by Marianne Hoppe
Frau Grohmann
Characters played by Mario Adorf
Herr Grohmann
Characters played by Bill Mitchell
Narrator
Characters played by Christopher Lee
Mr. U. N. Owen