Edward Allardice (1 episode)

Davencourt (13 episodes)

Henry Huxley (1 episode)

The Judge (1 episode)

Maj. Harriman

Brigadier (9 episodes)

Professor Eugene Quail (1 episode)

Sir Donald Stuffy

Sir Leo Pursuivant (2 episodes)

Commander (1 episode)

Hubbard

Sir Giles Barr-Partington (2 episodes)

Colonel Bantry (3 episodes)

Commander Hawksly (1 episode)

(1 episode)

Sir Ian Masterson (1 episode)

(7 episodes)

Sir Robert Muir (2 episodes)

George Frobisher

Jeremy Sangster (1 episode)

Breen

Mr. Bennet (5 episodes)

Buckingham (1 episode)

Nicholas (1 episode)

George Frobisher (9 episodes)

Chief Constable Chubb (5 episodes)

Angus Kinloch (13 episodes)

Mr Lumley

Colonel Winter (1 episode)

Bannister (7 episodes)

Bruce Johnson (1 episode)

Lord Collingford (13 episodes)

(1 episode)

Major Hacker

Chandler

Dr Spencer (1 episode)

Lord Simon Bowes

Nigel Selwyn

(1 episode)

Col. Kenneth Post

Ken Shield (1 episode)

(1 episode)

Mark (1 episode)

Capt. Turnbull

(372 episodes)

Trevor Sellers

Jimmy

Peter Marsh (2 episodes)