3. The Reichenbach Fall

Moriarty launches a simultaneous heist on the Tower of London, Bank of England, and Pentonville Prison, crimes for which he allows himself to be captured and put on trial. He secures not-guilty by intimidating the jury and visits Sherlock, explaining he still intends to "burn" him, taunting him with a "final problem" for him to solve. He also tries to destroy Sherlock's reputation. The two meet on the roof of a hospital, where Moriarty explains that assassins will kill John, Mrs. Hudson, and Lestrade if Sherlock does not commit suicide; he wants Sherlock to do this to cement his story after explaining that his "god code" was a myth.

Moriarty kills himself to force Sherlock to do the same. Sherlock calls John, confesses to being a fraud, states his final "goodbye" and then steps off the roof. Inspired by the short story " The Final Problem " and makes references to " The Greek Interpreter " (with the introduction of Mycroft Holmes at the Diogenes Club ) in addition to other works of Sir Arthur Conan Doyle. The title alludes to the Reichenbach Falls, where Holmes and Moriarty supposedly fall to their deaths in the original story.