Fellowship of the Frog

Both Scotland Yard and an amateur American sleuth are tracking a master criminal known as The Frog. This moniker refers to the bulging-eyed mask worn by the evildoer, and is reflected by the frog icons painfully tatooed onto the forearms of his henchmen. The trail leads to the country manor of an enigmatic, steely-eyed nabob, whose repressed son has eyes for the artistes at the Lolita cabaret, and whose lovely daughter captures the fancy of both the American playboy and the villain himself. Murder, kidnapping and seduction ensue.

• 
  Harald Reinl
• 
  Lothar Gündisch

• 
  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)