A 9-part movie serial- 1. The Last Cigarette 2. The Clash of Steel 3. The Dreaded Tube 4. The Crimson Blade 5. The Man in the Trunk 6. The Signet Ring 7. The International Spy 8. The Master Spy 9. The Mysterious Iron Ring.

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Main Cast: Kingsley Benedict, Jay Belasco, Vola Vale, Claire Du Brey, Jean Hersholt, Lee Shumway, Elsie Jane Wilson, Francis McDonald, Malcolm Blevins, Clyde Benson

Directors: Jack Wells, Hal Mohr, George Bronson Howard

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