Peter O'Toole

Sherlock Holmes (voice)

Ron Haddrick

Dr. Mortimer (voice)

Earle Cross

Dr. Watson (voice)

Helen Morse

Beryl Stapleton (voice)

Robin Stewart

Jack Stapleton (voice)

Moya O'Sullivan

Mrs. Barrymore (voice)

Phillip Hinton

(voice)

Ryszard Słapczyński