When a man that Joan Watson had employed as a secret mole inside Morland Holmes' organization is murdered during a robbery, Joan and Sherlock suspect that he was actually the target and begin investigating, searching for proof that Morland was behind the man's death. Written by
Did You Know?
"It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts." In this episode Sherlock expresses his opinion on detection to Morland Holmes using almost these exact words from "A Scandal in Bohemia," a story in which the central character is Irene Adler. See more