Murray McMurray (1 episode)
Argyll
Self (archive footage) (3 episodes)
Angus McGowan
Macrae of Balbuie (20 episodes)
Lawrence
Lord Maine (3 episodes)
John Tagg (1 episode)
John Tagg
Rev John Kirkwood
Sir Duncan Fraser (1 episode)
Mr. Campbell
Sandy Ross
John Bain
Captain Tregellis
Vecchio pastore (1 episode)
Sir Thomas Lipton
Head of Sarmoung Monastery
Lord Rohan
Headmaster
Charlie Cole (5 episodes)
Sir John Hassocks
Wickham Steed (1 episode)
Father Matthew
Adam Smith (2 episodes)
Ruthven
Sir John Hassocks (1 episode)
Professor Julian Fuchs
Von Gorian
John Guthrie (6 episodes)
Dr. Kemp
Robert Kelvin
O'Shea
Gordon Mackenzie
Robespierre (1 episode)
Valverde
Gilbert Kirby (1 episode)
Dr. John Newman (1 episode)
Capt. Owen Franklin
Dr. Petra Gheria (1 episode)
Prof. Bernard Quatermass
Gungaram
Octavian
Crawley (1 episode)
Col. James (1 episode)
Lord McSweeney
Father Sandor
Brierly
Poppa McCabe (1 episode)
O'Brien
Agrippa
Gerrard Winstanley (1 episode)
Jason Standing
Constable
Lance Corporal Campbell
Sergeant of the Guard
Inspector Harris
2nd Engineer Officer John Henry Hesketh
Constable
Prince John (12 episodes)
Laird McGregor (1 episode)
Mr. Beamster
The Reporter
Narrator
McKellaig
Charlie Ross
Septimus K. Peterson
Pub Chucker Outer