| Peter Cook |
Sherlock Holmes |
| Dudley Moore |
Dr. Watson |
| Dudley Moore |
Mrs. Ada Holmes |
| Dudley Moore |
Mr. Spiggot |
| Denholm Elliott |
Stapleton |
| Joan Greenwood |
Beryl Stapleton |
| Hugh Griffith |
Frankland |
| Irene Handl |
Mrs. Barrymore |
| Terry-Thomas |
Dr. Mortimer |
| Max Wall |
Arthur Barrymore |
| Spike Milligan |
Policeman |
| Henry Woolf |
Shopkeeper |
| Josephine Tewson |
Nun |
| Prunella Scales |
Glynis |
| Jessie Matthews |
Mrs. Tindale |
| Lucy Griffiths |
Iris |
| Dana Gillespie |
Mary Frankland |
| Roy Kinnear |
Seldon the Axe Murderer |
| Penelope Keith |
Massage Receptionist |
| Rita Webb |
Masseuse |
| Patsy Smart |
Masseuse |
| Mohammad Shamsi |
Masseuse |
| Mollie Maureen (as Molly Maureen) |
Mrs. Oviatt |
| Helena McCarthy |
Enid |
| Geoffrey Moon |
Perkins |
| Anna Wing |
Daphne Grainger |
| Vivian Neves (as Vivien Neve) |
Nun |
| Jacquie Stevens |
Nun |
| Ava Cadell |
Marsha |
| Sidney Johnson |
Rail Passenger |
| Pearl Hackney |
Rail Passenger |
| Sophie De La Rochefoucauld |
Supporting Artist (Extra) |
