Everyone knows the sworn enemy of Sherlock Holmes - Professor Moriarty. But many will probably be surprised to learn that Moriarty appears in person in only one Conan Doyle story, Holmes's Last Case. ...The public demanded new stories about Holmes and Moriarty, which marked the beginning of the latter's long and illustrious career in both books and on film and television. Moriarty returns in the next story, with his usual diabolical plans.