Roger Balfour (archive footage)
Uncle Geoffrey (uncredited)
Uncle Willie's Butler (uncredited)
Governor of Virginia
Clerk (uncredited)
Monsieur Dubois
L.F. (uncredited)
Chester B. Morlick - Thomas' Lawyer (uncredited)
Yeoman Usher (uncredited)
Man at Bronson's Fox Hunt
Passenger on Yacht
Mr. Gato (uncredited)
Art Dealer
Courtier (uncredited)
Dr. Francesco Antommarchi (uncredited)
Choisell (uncredited)
Judge at Harvey's Trial
General Bryce
Chief Officer of Ship Inquiry Board (uncredited)
Captain
Eric Ledyard
Territorial Consul Gilbert
Colonel Loder
Col. Wallis
Ellis Holden
Duke of Marlborough
J. P. Ridley
Toastmaster (uncredited)
British Agent in Shanghai
Sir Gerald Hume
Man at April's Party (uncredited)
Mr. B. Abercrombie
General
Everett (uncredited)
James Reynolds
Ralph Winters
Mr. Pride
Captain of Boat
Albert Devonshire
RAF Aerodrome Commander (uncredited)
Sir Basil Wynard
Colonel Braithwaite
The Governor Sir Ellery Bronson
General Horace G. Stevens
Henry Belmont
The Inspector
C.M. Chisholm
Explorer (uncredited)
Capt. Arthur Cope
Lakely
(uncredited)
Maj. J. W. Courtney
Dr. A. Peterson
Sir James Montgomery (Uncredited)
Mr. Galatalin
Speaker (uncredited)
Conference Chairman
Richard Clare, Moonyeen's Father
Arnold
Mr. Albright (uncredited)
Doctor (uncredited)
Mr. Adams (uncredited)
Dr. Tubbs
Count Walden
Sir William Gresham
Arthur - Trent's Junior Partner
Captain
Howard Crane
Dr. Burgess
Major General Visiting Hospital (uncredited)
The Man
Mac Moore
Mr. Hamilton
Marques de Castelar
Gilbert Crayle
Bathurst
Valmorin, the Prosecutor
Sir John Petrie
Sir George Mannering
General
Yacht Captain
Richard Danforth (episode 2)
The Real Lord Stonehill
John Moreland
The Earl of Rutfield
Mr. Post
Thomas L. Burke
Timothy Stanfield
Robert Blair
Roger Balfour
Boris Abelard
Ben Grimes
Mr. Muir
Contarini
Bryce Gilbert
J. van Dyke Parker
Capt. Collins
Lord Charles Chetwyn
Dr. Meyer Isaacson
Mr. Wallace
Dr. Herbert