John Nettleton

as Professor Coulter

as Mr. Macavoy (1 episode)

as 1st Magistrate

as Maurice

as Sam Bradshawe (1 episode)

as Minister for the Navy (1 episode)

as General Gracie

as Munro Hilliard (1 episode)

as Alan

as Groves

as Ned

as Mr Walker

as Charles (1 episode)

as Rev Ernest Matthews

as Wing Commander Harry Weldon

as Doctor Weiss

as Oliver Wanklin

as Sir Stephen Baxter (4 episodes)

as Richard's Father

as Vicar (1 episode)

as Sir Arnold Robinson (5 episodes), as Arnold Robinson

as Mr. Burrill (1 episode), as Mr. Walker (1 episode)

as Smith (7 episodes)