64 minutes
4/7/1939
In Puerto Rico to investigate a glut of contraband diamonds that are flooding the world's jewel market, Mr. Moto and his sidekick, a wrestler, find themselves involved in murders by thrown daggers, the frame-up of an overstressed Army colonel, and a pirate gang led by an unknown boss who has inside knowledge of the ensuing investigation.
Peter Lorre
as Kentaro Moto
Warren Hymer
as Twister McGurk
Amanda Duff
as Joan Castle
Robert Lowery
as Lt. George Bentley
Leon Ames
as Commissioner Madero
Jean Hersholt
as Mr. Sutter
Douglass Dumbrille
as Comdr. La Costa
Richard Lane
as Police Commissioner Gordon
Charles D. Brown
as Capt. Thomas Castle
Paul Harvey
as Gov. John Bentley
Eddie Marr
as Capt. Dahlen
Harry Woods
as Grant
Ward Bond
as Sailor Sam - Wrestler
Neely Edwards
as Moore - Governor's Aide
Renie Riano
as Librarian
Willie Best
as Launch Pilot
Grace Hayle
as Mrs. Brown
Edwin Stanley
as Doctor at Hospital
Walter Deming
as Drunk
Lester Dorr
as Real Ambulance Intern
Donald Douglas
as Ship's Officer - Fight Referee
Jimmie Dundee
as Driver
Ralph Dunn
as Cop with McGurk
Juan Duval
as Carlos - Butler
Harold Goodwin
as Ship Dispatch Officer
Oscar 'Dutch' Hendrian
as Sailor at Wrestling Match
Selmer Jackson
as Doctor
Edward Keane
as Washington Official
Al Kikume
as Sergeant holding McGurk at the Garage
George Magrill
as Officer
Tony Martelli
as Hotel Valet
Louis Mercier
as Hotel Valet
Lucille Miller
as Flirt at Dance
Gloria Roy
as Nurse
Lee Shumway
as Guard
Jack Stoney
as Henchman disguised as Ambulance Attendant
Harry Strang
as Henchman disguised as Ambulance Attendant
Max Wagner
as Sailor at Wrestling Match
Ray Walker
as Real Ambulance Intern