The Great Mouse Detective - Cast

Cast

• Barrie Ingham as Basil: A detective, based on the fictional sleuth Sherlock Holmes and the primary protagonist of the film. His main goal is to get Professor Ratigan behind bars and rescue Olivia Flaversham's father, while simultaneously preventing a royal assassination. There are a few differences between Basil in the book series and in the film version, such as mercurial moods in the latter. He also plays the violin rather well in the movie, whereas the book series stated Basil's violin playing was atrocious—instead, Basil played the flute.
• Vincent Price as Professor Ratigan: Basil's archenemy and the primary antagonist of the film. He is based on Professor James Moriarty from the Sherlock Holmes stories. He plots to seize control of the British monarchy. He and Basil are long-established archenemies. In the book series, it is revealed his given name is Padraic and that Ratigan is, in fact, a mouse. At the end of the film, he is knocked off Big Ben and disappears into the deep chasm below, following a fierce battle with Basil, similar to the Sherlock Homes story "The Final Problem".
• Val Bettin as Major Dr. David Q. Dawson, previously of the Queen's 66th Regiment in Afghanistan. His character is based upon Dr. John H. Watson from the Sherlock Holmes stories. The interaction between him and Basil mimics that of Watson and Holmes, as Dawson is constantly amazed by Basil's deductions. He eventually becomes Basil's associate, friend, and personal biographer.
• Susanne Pollatschek as Olivia Flaversham: A eight-year-old female mouse of Scottish descent who seeks Basil's help in finding her toymaker father.
• Candy Candido as Fidget: Ratigan's bumbling bat henchman. He tends to do the dirty work for his boss. He has a crippled wing and a peg leg, and, as a result, he cannot fly. Ratigan throws him off the side of his flying machine near the end of the film, and he falls into the Thames. He survives the fall in the book (how is not explained).
• Frank Welker as Toby: Basil's trustful Basset Hound. He technically belongs to Sherlock Holmes, who lives above Basil.
• Alan Young as Hiram Flaversham: Olivia's loving Scottish father. He works as a toymaker, and is kidnapped by Fidget to make the Queen Mousetoria robot for the evil Ratigan.
• Frank Welker as Felicia: Ratigan's massive and pompous pet cat. Ratigan calls upon her by ringing a special bell to dispose of traitors or anyone who makes him angry. She is chased by Toby and attacked by Royal Guard Dogs in the final part of the movie and is not seen again. She is presumed dead.
• Diana Chesney as Mrs. Judson: Basil's housekeeper. She adores Basil, but gets very annoyed when he mistreats her good pillows by shooting them with a pistol. She is based on Mrs. Hudson.
• Eve Brenner as Queen Mousetoria: The mouse queen of England, whom Ratigan attempts to depose of. She is a parody of Queen Victoria and the setting for this film coincides with the real Victoria's Diamond Jubilee (as can be seen with humans entering Buckingham Palace at the same time the mice are).
• Barrie Ingham as Bartholomew: One of Ratigan's henchmen. He meets his end early on during Ratigan's song when he drunkenly calls his boss a rat; enraged, Ratigan throws him outside and summons Felicia, who devours him.
• Basil Rathbone as Sherlock Holmes: The famous human detective who lives above Basil. His voice is taken from clips of the original Sherlock Holmes films.
• Laurie Main as Dr. Watson: The medical associate/partner of Sherlock Holmes, who also lives above Basil. Unlike Rathbone, voice clips of Nigel Bruce were not used for the cameo part of Watson.