Peter Miles

as Nyder (archive recording)

as Mr. Reise

as BBC Executive

as Bernard (1 episode)

as Mr. Dubbin

as Stephen Kedge

as Secretary Rontane

as Arranches (1 episode)

as Hamad (1 episode)

as Secretary Rontane (2 episodes)

as Major General Oster

as Major General Oster (1 episode)

as Manners (1 episode)

as Nyder

as Harry Gold (1 episode)

as Bradshaw (1 episode)

as Professor Whittaker

as Professor Heinz Laubenthal (2 episodes)

as Dr. Whatmore (2 episodes)

as Doctor

as William Radkin (1 episode), as Mr Brooks (1 episode), as Barman (1 episode)

as Registrar (1 episode)