Overview
Sherlock Holmes (also known as We Present Alan Wheatley as Mr. Sherlock Holmes in...) is a British mystery television series that was produced by the BBC featuring Alan Wheatley as Sherlock Holmes and Raymond Francis as Dr. Watson. This was the first series of Sherlock Holmes stories adapted for television.
All six episodes were adapted by C. A. Lejeune from the stories written by Arthur Conan Doyle. The series was broadcast live long before taping was an option. It is very unlikely that telerecordings of the live broadcasts were ever made, given the BBC didn't even attempt this method until 1953.
Production
Some sources state that a BBC filmed adaptation of "The Adventure of the Mazarin Stone" (which aired on 29 July 1951) starring Andrew Osborn as Holmes and Philip King as Watson was a pilot episode for the series while others state the "Mazarin Stone" adaptation was a separate project entirely and was filmed for the Festival of Britain.
According to series star Alan Wheatley, the genesis of the series resided with a review of his performance in a television adaptation of Patrick Hamilton's Rope:
From Wikipedia (CC BY-SA 4.0).