Jeremy Brett as Sherlock Holmes

Edward Hardwicke as Dr. John Watson

Juliet Aubrey as Dolores

Roy Marsden as John Stockton

Keith Barron as Rob Ferguson

Elizabeth Spriggs as Eileen Mason

Richard Dempsey as Jack Ferguson

Maurice Denham as Augustus Merridew

Jason Hetherington as Michael Mason

Peter Geddis as Mr. Gresty

Kate Lansbury as Mrs. Gresty

Yolanda Vazquez as Carlotta Ferguson

Maria Redmond as Vera Gresty

Freddie Jones as Pedlar

Hilary Mason as Miss Ruddock

Stephen Tomlin as PC Ware

Eileen O'Brien as Mrs Carter

Andy Abrahams as Mr. Carter

Marcello Walton as Tom Carter

Paul Parris as Albert, The Pageboy

Anthony Price as Ricardo, The Baby