as Bruno Merk
as Mr Justice Bates
as Father Nassau
as Franz Bayer
as Holvera(1 ep)
as Sir Walter Sloane(1 ep)
as Theopolos(1 ep)
as Sir Hugh Anderson(1 ep)
as Sir Hugh Alexander(1 ep)
as Magistrate(1 ep)
as Aramis(9 eps)
as Za-Tor
as Dr. Franklyn
as Razin, Liberius' Lieutenant
as Dr. Ravna
as Webster
as Johnson
as Prison Governor
as Colonel Rodriguez(1 ep)
as Inspector Thomas
as Nigel Pickering
as The Lawyer
as Interrogator
as Chief of Police
as Aubrey Clark
as Dr. Clifford Preston(1 ep)
as Woburn
as Du Guesclin
as Lord Byron
as Hobley
as Dr. Dennis Bord
as Spintho
as Mr. Perker