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Face of the Frog (1959)

IMDb: 6.3
1959

Scotland Yard and an American playboy investigate a criminal gang led by a mysterious man in a frog like mask

The Forger of London (1961)

IMDb: 6.1
1961

A ring of counterfeiters is flooding the country with phony money, and suspicion falls upon a wealthy playboy who may or may not have amnesia

The Invisible Dr. Mabuse (1962)

IMDb: 5.6
1962

Evil mastermind Dr Mabuse seeks Professor Erasmus secret invention, a device that makes one invisible, but a murder in a revue theatre brings the German police and the FBI into the mix

It Happened in Broad Daylight (1958)

IMDb: 7.9
1958

Having doubts about the guilt of the obvious suspect in the murder of an eight year old girl, a police detective decides to investigate the case on his own