The Case of the Silk Stocking (2004 BBC TV Movie)
https://www.youtube.com/watch?v=41hNuQgXRkc
Rupert Everett and Ian Hart were perfect as Holmes and Watson (respectively). Shame they only did one together and this was a new story which makes it extra fun. The cast also boasts Helen McCrory (from 'Peaky Blinders) and a certain Mr Michael Fassbender (before his movie career).