There's no shortage of references to Sir Arthur Conan Doyle's consulting detective, Sherlock Holmes. in Star Trek. First appearing in "A Study in Scarlet" in 1887, Holmes is considered a master of forensic deduction and logical reasoning, and clues to his works have since appeared in several of the Star Trek franchise's series and movies. From Star Trek's actors taking on the role of the literary logician to Holmes' arch-nemesis Professor Moriarty threatening the security of the Starship Enterprise and its crew, Star Trek has a wealth of Sherlock Holmes references.