This was the fourth and final time that Thorley Walters played Watson, each with a different actor playing Sherlock Holmes. He previously did so in Sherlock Holmes and the Deadly Necklace (1962) starring Christopher Lee, The Best House in London (1969) starring Peter Jeffrey, The Adventure of Sherlock Holmes' Smarter Brother (1975) starring Douglas Wilmer.
The illustration of Silver Blaze in the newspaper read by Sherlock Holmes is the actual illustration by Sidney Paget which accompanied the short story "Silver Blaze" when it was originally published in the December 1892 issue of "The Strand Magazine".
This episode takes from June 30 to July 5, 1895.