Alan MacNaughtan

as James Gillespie

as Karl Ritter

as Father McPhail (1 episode)

as Lewis Mandorf

as Professor Kröhling (1 episode)

as Prof. Geoffrey Jennings-Wilson (1 episode)

as Attorney General

as Lord Justice Mathew (1 episode)

as Austin Ruthyn (1 episode)

as Browne (3 episodes)

as Austin Ruthyn

as Brigadier Hugh Cairns

as Frank Ormsby (6 episodes)

as Ken Tuke

as Doctor

as Sir Humphrey Logan

as Bernard Smith (1 episode)

as Christopher Riley

as Doctor (1 episode), as Tuke (1 episode)

as Sir Humphrey Talbot (1 episode)

as Dr. Crawley (1 episode)

as The Head (1 episode)

as Sir Campbell Clark (1 episode)