A better take on the "Sherlock Holmes vs. Jack the Ripper" idea is A Study In Terror
, a British film from 1965 with John Neville as Holmes. It's more of a classic mystery than Murder By Decree
, and it lacks all that drivel about the Masons and Queen Victoria's grandson. I don't know if it's been released on DVD or BR, though, and it's been a long
time since I saw it.
Getting back to the faithful adaptations theme, it's not exactly a classic, but I'd recommend checking out the BBC version of The Day Of The Triffids.
It's much closer to Wyndham's novel than the early 60s theatrical version with Howard Keel. I first caught that on A&E in the early 80s (back before the channel forgot that A&E stood for Arts & Entertainment), and I waited 20 years before BBC brought it and the Louis Jourdan Count Dracula
out on home video.