Professor Padraic Ratigan is the main antagonist of Disney's 1986 animated feature film The Great Mouse Detective. An evil, pernicious, yet suave crime lord, he is the archenemy of Basil of Baker Street, who proves to be an obstacle in his grand scheme to control all of Mousedom. He is obsessed with his status as a mouse, but when labeled a rat, his ostentatious demeanor shatters and reveals a violent and savage mind. Ratigan is based on the character of the same name from Basil of Baker Street and the story's version of Professor James Moriarty from Sir Arthur Conan Doyle's Sherlock Holmes stories.