The Secret of NIMH is a 1982 American animated fantasy adventure film directed by Don Bluth in his directorial debut and based on Robert C. O'Brien's children's novel, Mrs. Frisby and the Rats of NIMH. Originally brought to Disney The Secret of NIMH became Don Bluth Studios first film after the Disney animator mass exodus and became a point of contention for Disney to defeat, a fight involving The Black Cauldon, Tron and The Fox and the Hound. Oh, and there was also a sequel, Secret of NIMH 2... Restore the SONCU!