Mary Gordon was a Scottish actress who mainly played housekeepers and mothers, most notably the landlady Mrs. Hudson in the Sherlock Holmes series of movies of the 1940s starring Basil Rathbone and Nigel Bruce. Her body of work included nearly 300 films between 1925 and 1950.

A series of fourteen films based on Sir Arthur Conan Doyle's Sherlock Holmes stories was released between 1939 and 1946; British actors Basil Rathbone and Nigel Bruce portrayed Sherlock Holmes and Dr. John Watson, respectively. The first two films in the series were produced by 20th Century-Fox and released in 1939. After these two films, Universal Pictures acquired the rights from the Doyle estate and produced a further twelve films.