Trivia / The Secret of NIMH

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• Acclaimed Flop: The first film received positive critical reception, but fizzled out at the box office. To be fair, it was up against E.T. the Extra-Terrestrial and MGM didn't help by barely releasing it into any theaters.
• Blooper:
  • During Nicodemus' "We Know Too Much" speech to Mrs. Brisby, at one part his eyebrows inexplicably disconnect from his head for a few frames! The same occurs with Jenner when he tells Sullivan, "Accidents could happen."
  • The establishing shot of the Brisby home has the smoke coming out slightly to the right of the chimney.
• Breakthrough Hit: For Don Bluth.
• Doing It for the Art: Several of the staff members had to work 110-hour^note That's approximately 15-16 hours a day! weeks during production, and Bluth and a few other higher-ups had to mortgage their houses to pay for the film.
• Dueling Dubs:
  • There's two Latin American Spanish dubs: One done in 1982 and another in 1997. Curiously enough, Rocío Garcel, who voiced Timothy Brisby in the 1982 dub, ended up voicing his mother Mrs. Brisby in the 1997 one.
  • Two Swedish dubs have been produced. The first one was recorded in 1989 by Videobolaget, for the VHS release. The second dub was recorded in 1995 by Media Dubb International, exclusively for broadcasts on the channel TV3. Louise Raeder voiced Mrs. Brisby in both dubs.
• Fun with Acronyms: "Nimh" is Irish Gaelic for poison. Probably a coincidence, unless the real NIMH wanted people to think of them as such. That, or O'Brien chose NIMH rather than some other laboratory for this reason.
• No Budget: The film was made on $7 million, and some of that budget was achieved by having Bluth and some higher-ups mortgaging their houses. In comparison, Disney's The Fox and the Hound, which was released a year prior, had a budget of $12 million. Because of the staff's resourcefulness and dedication, the film's presentation and art don't give the slightest trace of it being a shoestring effort.
• The Other Darrin: Almost everybody from the first film that reappears in the sequel has new voice actors. Jeremy and Mr. Ages are the only characters from the first film that retain their original voice actors.
  • In the sequel, Ms. Brisby (in the handful of lines she gets) is voiced by Debi Mae West. This is justified, as Brisby's original actress, Elizabeth Hartman, committed suicide in 1987.
  • Justin was voiced by Peter Strauss in the original film, while William H. Macy voices him in the sequel.
• Playing Against Type: B-movie regulars Aldo Ray and John Carradine as Sullivan and The Great Owl respectively. It's a bit odd to hear their signature voices in something that's not an exploitation movie.
• Screwed by the Studio: Early reports claimed that MGM was going to open the film in 1,000 screens in the United States; instead, they opened it in 100 theaters, only making it to 700. Variety alleged that MGM, which inherited the distribution rights through its acquisition of United Artists a year earlier, had no faith in the film.
• Real-Life Relative: In the 1982 Latin American Spanish dub, Diana Santos voiced Mrs. Brisby, while her cousin Cristina Camargo voiced Billy Fitzgibbons, and their uncle, Francisco Colmenero, voiced Mr. Ages.
• Renamed to Avoid Association: The film changes Mrs. Frisby's name to Mrs. Brisby because the original name sounded too similar to "Frisbee", the name of a popular toy in the 1980s.
• Sequel Gap: The Secret of NIMH 2: Timmy to the Rescue came out 16 years later.
• Troubled Production: The film was made in Bluth's garage with a budget so small that the last quarter of production was funded by Bluth, Gary Goldman and John Pomeroy mortgaging their houses. The high-quality animation Bluth was aiming for required the animators to work 16 hours a day, sometimes even taking work home with them. It was then ultimately given too small of a release to profit on even its meager budget, not helped by the fact that it was competing with freaking ET! Though the film did actually outperform Poltergeist (1982), Rocky III, Firefox and Star Trek II: The Wrath of Khan in its opening week in the few theaters it was released in, so one can only imagine how much better the film could've performed had MGM had more faith in it.
• Underage Casting: Derek Jacobi was only in his forties when he voiced the elderly Nicodemus.
• Vindicated by Cable: Due to its very limited release (see Troubled Production), the film only really became popular when the premium cable network HBO, which had just begun offering 24-hour, 7 days a week viewing, picked it up and aired it regularly.
• What Could Have Been:
  • According to Don Bluth's biography, NIMH originally had a screenwriter write a draft for it that stuck closer to the book. Another early draft by Steven Barnes had considerable differences from the final film; the scientists of NIMH also had a bigger role in the earlier drafts, with the story cutting back between them and the animals—the idea of making one of the scientists be a main villain, counterbalanced by other "good" scientists was discussed (the film reduced their role to a flashback and off-screen presence), Mrs. Brisby was supposed to be even more emotional. Isabella, a book character, would have been introduced (as opposed to being Adapted Out). There was also going to be a scene where Dragon the cat attacked the Brisby home, and after the rats drove him off, Mr. Ages and Justin would explain to Brisby's kids and what happened to their father. A climax would have involved NIMH gassing the den, with Brisby and the other rats trying to escape it. There was also no amulet; the only true challenge in the climax was Brisby making a "Leap of Faith" jump over a deadly chasm with her kids, only making it because of encouraging words previously spoken to her by Justin.
  • The film's second draft had a scene involving Mrs. Brisby saving a beached sea bass, which impressed the rats. The climax originally had Brisby's children enter the abandoned lair of the rats—Mrs. Brisby runs off and saves them, only to be seemingly crushed by a cave-in. Jeremy, the children, and Mrs. Shrew would mourn her loss, but it turns out Mrs. Brisby is alive—the sea bass she rescued earlier helped her find a secret exit from the lair inside a pond. Surprisingly, the ending also implies that the Rats of NIMH never actually existed (neither the children nor the humans can find any evidence of their presence), and were a self-improving hallucination Mrs. Brisby was having; according to the writers, they meant it to be an ambiguous ending that could go one way or the other. This second draft inspired Don to introduce more mystical and magical elements to the story.
  • To aid the subtext of the Great Owl and Nicodemus being one and the same, the idea of them sharing the same voice actor was considered, but they decided the film and cast needed more big name voice talent. Fans debate heavily to this day whether Nicodemus and the Owl are the same or not in the final film.
  • MGM actually asked Don Bluth Studios to work on the sequel, but due to heavy development on Anastasia, it had to be turned down (Bluth had actually spoke of early story ideas in which Timmy and Martin would play hero and villain, albeit in reversed roles from the final product).
  • One wonders what would have happened if, rather than the new plot they eventually wrote, the creators of the sequel movie had actually adapted Racso and the Rats of NIMH. While the book had its problems, in most respects it was a very satisfying and exciting book which showed how the rats of NIMH really would (and should) have designed Thorn Valley. Most even think it handled the "Timothy is the hero who will save Thorn Valley" plot far better than the movie sequel did — complete with a great deal of Not Now, Kiddo and How Do I Shot Web? before the rats actually listen to him and Rasco and he come up with ideas that actually work.
  • James Horner was suggested as a possible candidate to compose the music score. Don Bluth ended up hiring Horner for An American Tail and The Land Before Time.
  • After the council meeting, Mr.Ages and Justin take Mrs. Brisby to wait in the library. This led to a scene cut from the final film where Mrs. Brisby meets a young rat named Isabella, which is drawn straight from the book.
  • Disney was first approached to adapt Mrs. Frisby and the Rats of NIMH into a feature film. The studio declined for two reasons: they were already busy turning another Mouse World book into an animated movie, and they didn't want more mice mascots aside from Mickey Mouse. Disney later budged by making The Great Mouse Detective and The Rescuers Down Under.
• Write Who You Know: Jeremy being re-written as a hopeless romantic was loosely based on the staff cook who repeatedly tried flirting with Bluth while he and his crew were working on the "Don't Walk Away" segment on Xanadu.

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