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