Sir Arthur Conan Doyle published a story called "Silver Blaze" in 1892. In it, prize-winning racehorse Silver Blaze was missing, his trainer murdered, and the stable boy drugged. This broadcast of Elementary includes the death of one man but the failure of a plot to poison prize-winning racehorse Silver Blaze, now retired to stud. The remaining elements of the short story are not used.
Mycroft is opening a restaurant named Diogenes. In the original Sherlock Holmes cannon Mycroft was co-founder of the Diogenes Club a London gentleman's club; not in the sense of brass poles and lap dances, but in the sense of curried lamb every Thursday, retired Colonels doing the Times crossword puzzle, and brandy and cigars.
This episode guest star Olivia d'Abo. In Law&Order:Criminal Intent she plays a recurring character named Nicole Wallace. In L&O:CI the main detective, Goren, is based on Sherlock Holmes and Olivia d'Abo represents the Moriaty character.
Ken Marks has played four different characters over the course of the series:
- Episode 3.8 End of Watch (2014) - Moderator
- Episode 2.21 The Man with the Twisted Lip (2014) - Meeting Leader
- Episode 2.7 The Marchioness (2013) - Chairman
- Episode 1.2 While You Were Sleeping (2012) - Moderator