Opening Christmas Day . . . "Holmes and Watson" (PG-13) . . . Will Farrell is Sherlock Holmes and John C. Reilly is Doctor Watson in a comedy where they have to solve a murder in four days to keep Professor Moriarty from killing the Queen. Hugh Laurie is in it as Sherlock's brother, Mycroft Holmes, and Moriarty is played by Voldemort himself, Ralph Fiennes.