TRAPPED! What is the invisible death that strikes from afar? What is the mystery of the flickering light? Who is the woman that witnesses a killing and vanishes? It's Drummond's greatest case...and your biggest thrill!

The invention of a machine that can cause remote explosions brings the attention of Scotland Yard and Bulldog Drummond.

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Main Cast: John Howard, Heather Angel, H.B. Warner, Reginald Denny, E. E. Clive, Jean Fenwick, Zeffie Tilbury, George Zucco, Leonard Mudie, Evan Thomas

Director: James P. Hogan

Writer: Stuart Palmer

Editor: Stuart Gilmore

Cinematographer: Ted Tetzlaff

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