Although there was no televised sequel to this story, Gerald Frow penned a follow-up for Granada's Dragon Books (who in 1982 published his novelisation of this tale). "Young Sherlock: The Adventure at Ferryman's Creek" went on sale in 1984.
The television acting debut of Guy Henry. Although Sherlock has just turned 17, he himself was almost 22. He went on to provide the physical and vocal performance for Grand Moff Tarkin in Rogue One: A Star Wars story (2016), where the digital likenesses of Holmes predecessor Peter Cushing was superimposed over him. Cushing's estate were delighted with the way he had recreated the late actor's mannerisms.
Guy Henry is so audibly losing his voice towards the close of the run that small comments were put into the script, such as Sowerbutts' reference to the young detective's cold.
The opening title sequence sees Sherlock Holmes' memoirs ("To be handed to Doctor Watson and listened to only after my death") being played on an Edison Gem wax cylinder phonograph, introduced in 1899. If it is the estimable Doctor himself playing them he commits a cardinal sin: wax cylinders should be handled using the fingers through the inside 'roll', not touching the waxy exterior which damages the recording held thereon.
The drama begins in November 1871, as a 17 year-old Sherlock returns home from school to Pendargh ("on the fringe of the Lancashire fells"). His ancestors had lived at Pendargh Manor House as squires for generations (as noted in Sir Arthur Conan Doyle's 1893 short story "The Adventure of the Greek Interpreter").