The invention of a machine that can cause remote explosions brings the attention of Scotland Yard and Bulldog Drummond.
John Howard
as Captain Hugh C. Drummond
Heather Angel
as Phyllis Clavering
H.B. Warner
as Colonel Nielsen
Reginald Denny
as Algy Longworth
E. E. Clive
as Tenny
Jean Fenwick
as Lady Beryl Ledyard
Zeffie Tilbury
as Aunt Meg
George Zucco
as Rolf Alferson
Leonard Mudie
as Richard Gannett
Evan Thomas
as Smith
Clyde Cook
as Constable Sacker
David Clyde
as Constable McThane
