Fizz
Major
Peter Quentel
House Detective
Lennox
Mr. Baker
Sergeant
Salvation Army Captain
Ray
Mr Batsford
Mayor of London / Sir John Fastolfe
Thomas Horner / Lord Clifford
Duke of Somerset
Dr. Lambert (voice)
Lord Grey / Lord Mayor of London
Inland Revenue Manager (uncredited)
Sid
Male Nurse (uncredited)
Cully
Fizz / Fox
Fireman
Westminster Abbey Priest
DCI Roan
Dr. Hawker
Mr Henderson
Peter Stroud
Salcombe Hardy
Dad Matheson
Carpenter
Inspector Marriott
Colonel Dent
Sir Harcourt Griffiths
Ronald Barrett
Mr. Johnson
Mr. Naysmith-Jones
2nd Farmer
Mr. Drayton
Robson
Mr. Grover
Clarke
Anaesthetist
Louis