Merchants hire a foreign criminal to kidnap a scientist for the secret of manufacturing diamonds.
Jack Buchanan
Captain Hugh Drummond
Betty Faire
Phyllis Benton
Juliette Compton
Irma Peterson
Allan Jeayes
Carl Peterson
Austin Leigh
Professor Goodman
Frank Goldsmith
Sir Raymond Blayntree
Edward Sorley
Julius Freyder
Phil Scott
Sparring Partner
