- Actor-Shared Background: Louise Brealey, who plays Molly Hooper, is a feminist. In this episode, she plays a suffragist, which were precursors to modern feminism. However, Brealey, unlike Victorian Molly, isn't involved in baroque murder/suicide/terrorism gender equality plots. As far as we know.
- Beam Me Up, Scotty!: The classic Holmesian example of "Elementary, my dear Watson" is alluded to when Sherlock actually uses the phrase.
- Mutually Fictional: The Victorian and Modern settings are suggested to be this by The Stinger.
- Recursive Adaptation: The original premise of the show was "Sherlock Holmes IN MODERN DAY!". Now that it has its own notoriety, this episode is "Sherlock in VICTORIAN LONDON!".
Trivia / Sherlock Special "The Abominable Bride"