Peter Wyngarde
— Werner Loder
John Robinson
— Franz Von Markheim
Cyril Luckham
— Wolfgang Himmelmann
John Arnatt
— General Von Schiltz
Peter Arne
— The Old Visitor/Adolf Hitler
Ronald Radd
— Karl-Heinz Fessell
George Sperdakos
— The Ambassador
Shusha Assar
— The Ambassador's Wife
David de Keyser
— Man in the Shadows
Mark Petersen
— The Young Visitor