Grandfather
Father Silva
Jack Soames
Vicar
Maitland
Lord Charles Somerset (10 episodes)
Dr Stirry
Sir Isaac Newton (4 episodes)
Brigadier Croshawe
Sir Daniel Penwarden (1 episode)
Father
Narrator (voice) (1 episode)
Georg Friedrich Handel
Uncle George
Lord Fairfax (3 episodes)
Judge Broomfield
Lord Henry Ames
Gustave Kummer
Prof. Heinrich Tessenow (2 episodes)
Yoshka Poliakeff
Dan 'Saltie' Wicklow (6 episodes)
Richard Wagner (5 episodes)
Col. Tusker Smalley
Windwalker
Krypton Elder (archive footage) (uncredited)
Sir Henry Rawlinson
Jack Cartwright
Program Controller
Sir Michael Hughes
Father Malone
1st Elder
The Man
Alec Mackenzie
Sir Hector
Capt. Foster Fyans
Don Consalvo Saccone (5 episodes)
Squire Western
Lieutenant Colonel Silkin
Johannes
Comdr. Rice
Abbé Faria
Colonnello Benjamin Strang
Paul Bellamy
Clyde Massey
Supt. Bellamy
Colonel Azarin
The Abbot
Dr. Rank
Richard Wagner
Lieutenant Cartwright, Detective Superintendant
Pope Leo
William Cecil
Lord Advocate
Trevor Dawson
Self - Guest (1 episode)
Inspector
Father Collins
Twinky's Grandfather
Air Vice Marshal Keith Park
Lord Cardigan
Robert Hook
Freddie Young
Freddie Young (Distinguished Civilian)
Sam Lincoln
Mostyn
Napoleon
Colonel Statter
Major Eric Fincham
Professor Lindemann
Commander Frank Houghton
Major Kensington
Benjamin Disraeli (1 episode)
Napoleon (1 episode)
Benjamin Disraeli
Ejlert Lövborg
Capt. William Bligh
John Bullit
Walter Morel
Robert Wilson
John Bain
Dr. Derek Lester (1 episode)
Capt. Chris Ford
James Prothero
Frank McNally
Denis Fallentin
Browne
Vittorio (1 episode)
Doug Elliott (1 episode)
Captain Thompson
Inspector Lewis
Major Roger Court
Harry Scobie
Lt. Cmdr Hugh Alginon Fraser
Peter Willems
Guest at Theater Accepting Program (uncredited)
Maj. David Somers
Captain Peter Churchill
David Redfern
Major Calloway
Prof. Steven Stratton
Dr. Richard Whiteside
George Clement 'Clem' Morgan
Dr. Barnes
Lt. David Bayne
Dr. Alec Harvey
Squadron Leader Carter
Officer on Ship (uncredited)