Roger Tréville
From The Arthur Conan Doyle Encyclopedia

Roger Tréville (17 november 1902 - 27 september 2005) was a French actor, son of Georges Tréville. His father played Sherlock Holmes in the 1912-1913 silent films : Sherlock Holmes.
Roger Tréville played Count Tennow in 1955 in The Case of the Baker Street Nursemaids of the TV series Sherlock Holmes (1954-1955) with Ronald Howard as Sherlock Holmes and Howard Marion-Crawford as Dr. Watson.
TV
- 1955 : Sherlock Holmes: The Case of the Baker Street Nursemaids (as Count Tennow)