David Langton

as Doctor (1 episode)

as Rupert Potter

as Govt Minister

as Mr Edwards (1 episode)

as Victor Frankham

as Victor Frankham (1 episode)

as Sir James Damery (1 episode)

as Sir Charles Baskerville

as Mr. Erskine

as Herbert Henry Asquith (1 episode)

as Mayhew

as Earl Mountbatten

as Mr. Erskine (1 episode)

as John Warrington (16 episodes)

as Goldstar

as Sir Geoffrey

as Duc De Morny

as The Duke of Denver (5 episodes), as Duke of Denver (2 episodes)

as Duke of Denver (2 episodes)

as Richard Bellamy (60 episodes)

as Rupert (1 episode)

as Chief. Con. Corsby

as Melville

as Cpt. Cruikshank

as Ko Chin Yuan (1 episode)