Fizz

Mr Henderson (1 episode)

Colonel Dent (4 episodes)

Badge Messenger (1 episode)

Westminster Abbey Priest

Mr. Naysmith-Jones (1 episode)

Dr. Lambert (voice)

2nd Farmer (2 episodes)

Mr Batsford

Ray

Peter Stroud (1 episode)

Fizz / Fox

Dr. Hawker (1 episode)

Robson (2 episodes)

Sir Harcourt Griffiths (2 episodes)

Dad Matheson (20 episodes)

Ronald Barrett (1 episode)

Sid

House Detective (1 episode)

House Detective

Mr. Johnson (1 episode)

Fireman

Mr. Drayton (1 episode)

Mr. Grover (2 episodes)

Major

Salcombe Hardy (4 episodes)

Lennox

Inland Revenue Manager (uncredited)

Peter Quentel

Carpenter (1 episode)

Inspector Marriott (1 episode)

Inspector Kirby

Lord Grey / Lord Mayor of London

Duke of Somerset

Thomas Horner / Lord Clifford

Mayor of London / Sir John Fastolfe

DCI Roan (1 episode)

Sergeant

Salvation Army Captain

John Wallis (1 episode)

Louis (1 episode)

Cully (5 episodes)

Freddie (1 episode)

Mr. Baker

Mr. Baker (1 episode)

Featherston (1 episode)

Clarke (1 episode)

Anaesthetist (1 episode)

Male Nurse (uncredited)