Mr. Moto investigates diamond smuggling in Puerto Rico after an earlier investigator is killed, the murder of a boxer in the ring, conspiracies against the British and French governments in Egypt, and the events on a ship bound for Shanghai when he recognizes his steward as a murderer from San Francisco.

Based on the books by John P. Marquand; Mr. Moto in Danger Island also based on the novel Murder in Trinidad by John W. Vandercook. Originally released as motion pictures 1937-1939. Features: 1965 feature film The return of Mr. Moto with commentary by star Henry Silva, behind the scenes "Mr. Moto meets Mr. Chan : the making of Mr. Moto's gamble," documentary "Mr. Moto's creator," featurettes, trailers.

Mr. Moto in Danger Island (1939) / produced by John Stone ; directed by Herbert I. Leeds ; screenplay by Peter Milne -- Mr. Moto's gamble (1938) / produced by John Stone, Sol M. Wurtzel ; directed by James Tinling ; screenplay by Charles Belden, Jerome Cady -- Mr. Moto's last warning (1939) / directed by Norman Foster ; screenplay by Philip MacDonald, Norman Foster -- Think fast Mr. Moto (1937) / produced by Sol M. Wurtzel ; directed by Norman Foster ; screenplay by Norman Foster, Charles Kenyon, Howard Ellis Smith.