Der Frosch mit der Maske

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)