Peter Milne, Peter Lorre, John P. Marquand, Jean Hersholt, Amanda Duff, Warren Hymer, Herbert I. Leeds, John Reinhardt, George Bricker, John W. Vandercook, Jack Jungmeyer, Edith Skouras

Mr. Moto in Danger Island is a movie starring Peter Lorre, Jean Hersholt, and Amanda Duff. The U.S. government asks Mr. Moto to go to Puerto Rico to investigate diamond smuggling after an earlier investigator is murdered.