"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.
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