Dr. Joseph Valentine is the main antagonist of the Secret of NIMH franchise, serving as the unseen overarching antagonist of The Secret of NIMH and the main antagonist of The Secret of NIMH 2: Timmy to the Rescue. He is a cruel doctor who is revealed to be the head of the NIMH corporation who originally used Martin for one of his neurological experiments and brainwashed him to insanity. It wasn't until Timmy made it to NIMH that Martin brainwashed him and made Valentine and the other scientists think that they are dogs. He is voiced by Steve Mackall.
Role in the film[]
The Secret of NIMH 2: Timmy to the Rescue[]
Gallery[]
Trivia[]
- It is unclear if Dr. Valentine is the original scientist who created the Rats of NIMH or what the nature of his research was for (possible medical study, zoology study, biological warfare, black marketing, etc.)
- If Dr. Valentine injected Martin Brisby with the same drugs he experimented with on the Rats of NIMH, then Martin's insanity is partial proof that the NIMH performance enhancer does indeed have a small percent chance of causing its animal patients to exhibit aggressive and violent tendencies as well as a disregard for others.
- This would then prove that Jenner was most likely affected by this same percentage and logic.
| The Secret of NIMH |
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 Characters: Mrs. Brisby | The Great Owl | Jeremy | Nicodemus | Mr. Ages | Auntie Shrew | Justin | Jenner | Sullivan | Teresa Brisby | Cynthia Brisby | Martin Brisby | Timothy Brisby | Brutus | Jonathan Brisby | Farmer Paul Fitzgibbons | Mrs. Beth Fitzgibbons | Billy Fitzgibbons | Dragon | Miss Right | Jenny McBride | Cecil | Joseph Valentine | Muriel & Floyd Songs Flying Dreams | My Life and My Love | Come Make the Most of Your Life | I Will Show the World | Magic Mystery Show | Just Say Yes! | All I Had is Gone |