directly." The episode also uses an identical clue to the original story, but gives it a different meaning: both stories feature "Rache" written at the scene of the crime. In the original story, Holmes dismisses a suggestion that the victim was trying to write "Rachel", instead pointing out that "Rache" is German for "revenge". In this version Holmes's interpretation is reversed: he scoffs at the "revenge" explanation and suggests the victim was trying to write "Rachel". The "three-patch problem" that Holmes describes is similar to the term "three-pipe problem" he uses in "The Red-Headed League". The mention by Mrs. Hudson of "Mrs. Turner who lives next door" is a reference to a point in "A Scandal in Bohemia", where Holmes' landlady is once named as Mrs. Turner, instead of as Mrs. Hudson. The feverish shout of "The game, Mrs. Hudson, is on!" is a reference to a line in "The Adventure of the Abbey Grange", "The game is afoot", which is frequently accredited to Holmes in adaptations. In the 2013 mini-episode "Many Happy Returns", a newspaper headline tantalisingly reads "The game is back on" as a harbinger of the character's imminent return. The cabbie is dying of a brain aneurysm, while the murderer in A Study in Scarlet is dying of an aortic aneurysm. Watson's reference in the final scene to having been shot in the shoulder but developing a psychosomatic limp in the leg is an allusion to a continuity error in the Conan Doyle stories: in the original A Study in Scarlet Watson's injury is said to be in his shoulder, but in Conan Doyle's later Holmes stories, it is said to be in his leg. The second murder victim's name is James Phillimore, a reference to a case Holmes failed to solve in "The Problem of Thor Bridge". The text messages Holmes sends Watson are taken nearly word for word from a telegram Holmes sends Watson in "The Adventure of the Creeping Man". The case Holmes is working on when he meets Watson involves a guilty brother with a green ladder. This is an apparent reference to an unfinished story found after Conan Doyle's death since completed as "The Adventure of the Tall Man" and included (sometimes as only the original outline) in some editions of the Sherlock Holmes Apocrypha. Production The story was originally filmed as a 60-minute pilot for Sherlock, directed by Coky Giedroyc. It