(archive footage)
Marquis of Gleneyre
George, 10th Duke of Bristol
Leslie Pagan
Maj. Lessart
Peter Conroy
Dr. Karl Roder
Captain Tom Armitage
Robert Maine / Manning
Sir Hubert Ware
Ann Daviot
King Regis VI
Malcolm Stevenson
Dr. Struensee
Dr. Jack Overton
Mr. Latimer
Dan Pritchard
Gordon Evers
Colin Grant
Robert Marryot
Sherlock Holmes
John Curry
Himself (uncredited)
Captain Tony Clyde
Captain Donald 'Doc' Harvey
George Boyd
James Morton Towner
Jim Warren
Drake Norris
Norman Cravath
Capt. William Levison
Noel Adams
Neil Dunlap
Reginald De Brett
Sherlock Holmes
Hon. Courtenay Parkes
Daniel Farr
Sherlock Holmes
Robert Miles
Lt. Jack Durrance
Frank Gregory
Sir John Marlay
Heliotrope Harry
Benson
Archduke Alexander
Michael Bream
Henri de Briac
Stephen Athelstan
Oskar Muller
Anthony Haldane
Rolls Royce Wensel
Jean Corot
Norodin
Peter Williams
Clifford Dudley
Jerry Benson
Tad Workman
Lester Knapp
Jerry Winters
Alan Tahyer
Matthew Dale Sr.
Rudolph Solomon
Henry Wallis
Georges Gautier
Dr. Alan Monteagle
Adrien St. Clair
Robin Field
Michael Strong
Noel Jason
Dorian Clavering
David Compton / David Anson-Pond
Walter Hyde
Vivian Caryll
Lionel Daventry
Rawdon Crawley
Astral Hither
Mallinger Grandcourt
