The invention of a machine that can cause remote explosions brings the attention of Scotland Yard and Bulldog Drummond.
Captain Hugh C. Drummond
Phyllis Clavering
Colonel Nielsen
Algy Longworth
Tenny
Lady Beryl Ledyard
Aunt Meg
Rolf Alferson
Richard Gannett
Smith
Constable Sacker
Constable McThane
Soongh
Sir Malcolm McLeonard
Sir Basil Leghorne
Old Major Trumleigh
Inspector Tredennis
Gumba, Bird Seller
Guggins, Scrawny Henchman
Steward
Cop
Aquarium Guard
Constable at Gannett House
Hotel Page Boy
Maid
Native Boy with Message
Native Selling Rifle
Native Buying Rifle
Tourist
Tourist
Tourist
Island Police Desk Sergeant
Island Police Arresting Sergeant
Foreign Agent
Foreign Agent
