The Great Mouse Detective (released as Basil the Great Mouse Detective in some countries and as The Adventures of the Great Mouse Detective for its 1992 American re-release) is a 1986 American animated mystery adventure film produced by Walt Disney Feature Animation and released by Walt Disney Pictures. It is based on the children's book series Basil of Baker Street by Eve Titus and Paul Galdone, and was written and directed by John Musker, Dave Michener, Ron Clements, and Burny Mattinson in their feature directorial debuts. Featuring the voices of Vincent Price, Barrie Ingham, Val Bettin, Susanne Pollatschek, Candy Candido, Diana Chesney, Eve Brenner, and Alan Young, the film's plot follows Basil of Baker Street, a mouse detective who undertakes to help the young mouse Olivia find and save her father from the criminal mastermind and Basil's sworn enemy, Professor Ratigan.