John Barrie

as Edwin

as Sammie

as Vladimir Horvic (1 episode)

as Mr. Hagerup

as Edwin (1 episode)

as Air Vice-Marshal Sir Arthur Coningham

as Dr John Somers (35 episodes)

as Supt. Sloane

as Franklin

as Jack Hollins (1 episode)

as Rupert Tempest (1 episode)

as Uncle Sid (1 episode), as Sammy (1 episode)

as Mr. Sheldrake (1 episode)

as Nathan Pimblett (1 episode)

as Will Rikker (1 episode)

as Fyodor Karamazo (6 episodes)

as Fred Moore (1 episode)

as Sergeant Cork (66 episodes)

as Sir Bevidere

as Coleman (1 episode), as Elliot Vascoe (1 episode)

as Henry Hobson

as Mr Gordon

as DCI Sam Hudson (416 episodes)

as Mr. Chard