Basil, the rodent Sherlock Holmes, investigates the kidnapping of a toymaker and uncovers its link to a conspiracy to commit high treason.

Based on the Basil of Baker Street book series by Eve Titus and Paul Galdone. Originally released as a motion picture in 1986. Features: making of The great mouse detective, "Clock cleaners" animated short, "Donald's crime" animated short, The world's greatest criminal mind, The great mouse detective scrapbook.