The Great Mouse Detective is a 1986 animated film produced by Walt Disney Feature Animation, originally released to movie theaters on July 2, 1986 by Walt Disney Pictures. The twenty-sixth animated feature in the Disney Animated Canon, the film was directed by Burny Mattinson, David Michener, and the team of John Musker and Ron Clements, who later directed Disney's hit films The Little Mermaid and Aladdin. The film was also known as The Adventures of the Great Mouse Detective for its 1992 theatrical re-release and Basil the Great Mouse Detective in some countries. The main characters are all mice and rats living in Victorian London.
Based on the children's book series Basil of Baker Street by Eve Titus, it draws heavily on the tradition of Sherlock Holmes with a heroic mouse who consciously emulates the detective; Titus named the main character after actor Basil Rathbone, who is best remembered for playing Holmes in film (and whose voice, sampled from the Red-Headed League was the voice of Holmes in this film, 19 years after his death). Interestingly, Sherlock Holmes also mentions "Basil" as one of his aliases in the Arthur Conan Doyle story "The Adventure of Black Peter".