Elenco (na ordem dos créditos)
Ronald Adam
Dr. Dionysius Genoni
Elwyn Brook-Jones
The Baron Tito Belcredi
Cyril Conway
Harold
Willoughby Gray
Ordulph
Joyce Heron
Frida
Geoffrey Keen
Landolph
Mary Merrall
Donna Matilda Spina
Ralph Michael
The Emperor Henry IV
Kenneth More
The Marquis Charles di Nolli
Alan Reid
Second soldier
Frederick Ross
Old John
Sydney Tafler
Berthold