Joachim Fuchsberger
Richard Gordon
Siegfried Lowitz
(Ober-)Inspektor Elk (German version) /(Chief) Inspector Hedge (English version)
Eddi Arent
James
Elfie von Kalckreuth
Ella Bennet
Walter Wilz
Ray Bennet
Carl Lange
John Bennet
Dieter Eppler
Joshua Broad
Jochen Brockmann
Philo Johnson
Ernst Fritz Fürbringer
Sir Archibald
Eva Pflug
Lolita
Fritz Rasp
Ezra Maitland
Erwin Strahl
Sergeant Balder (German version) /Sergeant Barclay (English version)
Ulrich Beiger
Everett
Michel Hildesheim
Mills
Charlotte Scheier-Herold
Lady Maggie Farnsworth (German version) /Lady Aubrid Farnsworth (English version)
Reinhard Kolldehoff
Lew Brady
Benno Gellenbeck
Inspector Ghent (voice) (uncredited)
Werner Hedman
Inspektor Genter (German version) /Inspector Higgins (English version) (uncredited)
Günther Jerschke
Voice of Newsreader on Radio (voice) (uncredited)
Holger Munk
Sgt. Rubby (Sir Archibalds Vorzimmer-Sergeant) (uncredited)