"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
George Regas
as Soongh
Neil Fitzgerald
as Sir Malcolm McLeonard
Claud Allister
as Sir Basil Leghorne
Ferdinand Munier
as Old Major Trumleigh
John Sutton
as Inspector Tredennis
John Davidson
as Gumba, Bird Seller
John Rogers
as Guggins, Scrawny Henchman
Jimmy Aubrey
as Steward
Frank Baker
as Cop
Billy Bevan
as Aquarium Guard
Forrester Harvey
as Constable at Gannett House
Eugene Jackson
as Hotel Page Boy
Ruth Rogers
as Maid
Harold Garrison
as Native Boy with Message
Frank Lackteen
as Native Selling Rifle
Steve Clemente
as Native Buying Rifle
Kathryn Bates
as Tourist
Neil Craig
Grace Hayle
Gerald Rogers
as Island Police Desk Sergeant
Olaf Hytten
as Island Police Arresting Sergeant
Sam Savitsky
as Foreign Agent
Hercules Mendez
James P. Hogan
Director
Stuart Palmer
Screenplay
Ted Tetzlaff
Director of Photography
Stuart Gilmore
Editor
Franz Bachelin
Art Direction
Richard Olson
Sound Recordist
Gerard Carbonara
Original Music Composer
Herman C. McNeile
Novel
Boris Morros
Music Director
William LeBaron
Executive Producer
Stuart Walker
Producer
Hans Dreier
A. E. Freudeman
Set Decoration
Hugo Grenzbach
Harry Scott
Assistant Director