I like the casting in A Study in Terror of Holmes and Watson more than in Murder by Decree. Production values are better in the latter, but it's also more gruesome and graphic.
The Ian Richardson films are excellent, and I'd love to see high quality transfers of them.
Stewart Granger made an ABC TV-movie version of HOUND OF THE BASKERVILLES with William Shatner as Stapleton that wasn't very good (it was actually a pilot for a proposed HOLMES TV series that would be...