Edwin (1 episode)

Edwin

Sammie

Rupert Tempest (1 episode)

Vladimir Horvic (1 episode)

Mr. Hagerup

Air Vice-Marshal Sir Arthur Coningham

Dr. John Somers (6 episodes)

Supt. Sloane

Franklin

Jack Hollins (1 episode)

(1 episode)

DCI Sam Hudson (416 episodes)

Mr. Sheldrake (1 episode)

Will Rikker (1 episode)

(1 episode)

Coleman (1 episode)

Elliot Vascoe (1 episode)

Sergeant Cork (66 episodes)

Sir Bevidere

Henry Hobson

Mr Gordon

Mr. Chard

Dad (1 episode)

Inspector Harris

(6 episodes)

Bert Gay