From The Arthur Conan Doyle Encyclopedia
Geoffrey Russel (1925 - 1 june 2004) was an actor who played Professor Martin in episode Four Minus Four is One (TV episode 1979) (1979) and the Commissioner in The Case of the Perfect Crime (1979) in the TV series Sherlock Holmes and Doctor Watson with Geoffrey Whitehead as Sherlock Holmes. The same year he played the Home Secretary Henry Matthews in Murder by Decree with James Mason as Sherlock Holmes.
- 1984 : The Case of Marcel Duchamp (as M. Julliard)
- 1979 : The Case of the Perfect Crime (as the Commissioner)
- 1979 : Four Minus Four is One (as Professor Martin)