The Great Radium Mystery
Criminals steal a radium-powered tank from an inventor. His heiress and a government agent take up the chase.
- Year: 1919
- Country: United States of America
- Genre: Adventure, Action
- Studio: Universal Film Manufacturing Company
- Keyword: government agent, movie serial
- Director: Robert Broadwell, Robert F. Hill
- Cast: Cleo Madison, Bob Reeves, Eileen Sedgwick, Bob Kortman, Ed Brady