Storyline
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.
Top Cast
Peter Lorre
Kentaro Moto
Warren Hymer
Twister McGurk
Amanda Duff
Joan Castle
Robert Lowery
Lt. George Bentley
Leon Ames
Commissioner Madero
Jean Hersholt
Mr. Sutter
Douglass Dumbrille
Comdr. La Costa
Richard Lane
Police Commissioner Gordon
Charles D. Brown
Capt. Thomas Castle
Paul Harvey
Gov. John Bentley
Eddie Marr
Capt. Dahlen
Harry Woods
Grant
Ward Bond
Sailor Sam - Wrestler
Neely Edwards
Moore - Governor's Aide
Renie Riano
Librarian
Willie Best
Launch Pilot
Grace Hayle
Mrs. Brown
Edwin Stanley
Doctor at Hospital
Walter Deming
Drunk
Lester Dorr
Real Ambulance Intern
Herbert I. Leeds
Peter Milne
Released
