Dr. Mario Lowell
Benjamin Ovington
Publisher
Captain
Maj. Ian MacAllister
Frank Crawley
Dr. John Keith
Rev. Mortimer Thynne
Comrade Clayton
Mr. Agee
Lord Arnold Dwellyn (voice / uncredited)
Franz Kovac, Money Courier
Owner of Jaguar
Neighbour (uncredited)
Jack Matlock
Inspector Mole
Zacharias
Sir Douglas Devereaux
Walter Monckton
Joe Lawson
The Stranger
Dr. Whitmore
The clown
Dr. Graham
Dr. Alexander Manette
Wing Cdr. Allen
Lancaster Crew
Mr. Henderson
Abbott
Clown
Earl Morehead
Sir Tony Beardsley
Mathews
Walter Moran
Roger
Angus McFee
Mr. Lane-Mariot
Professor Dietrich
Howard Hopkins
Dave Rogers
Valentine Estes
Nathan Bly
The Maharajah
Old Waiter
Felix Mulholland
Dr. Reynard
Burnside
Oliver Teleton
James
Harry Fulham
Charles Justin
Specter (voice)
Statesman Geller