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Background information
Feature films The Secret of NIMH
Television programs
Video games
Park attractions
Portrayed by
Portrayed by
Voice Paul Shenar
Performance model
Honors and awards
Character information
Full name
Other names
Personality Brutal, bloodthirsty, power hungry, self assured, vicious
Appearance Slender rat, grey fur, thick black eyebrows, goatee, green demonic eyes, red tunic, pink-purple-and black cloak, square gold pendant, barefoot
Occupation Rat of the Thornbush
Affiliations Bad
Goal To kill Nicodemus to pressure the rats into staying in the rosebush with him (succeeded);
Also to get the amulet he gave to Mrs. Brisby and become the leader of the rats (failed)
Home The Rose Bush
Allies Dragon
Minions Sullivan (formerly), The Council rats
Enemies Mrs. Brisby, Justin, the rats, Sullivan, Nicodemus, Mr. Ages, Jeremy, Auntie Shrew, Martin Brisby, Teresa Brisby, Cynthia Brisby, Jonathan Brisby
Likes Power, lust, possibly Elizabeth Brisby (perhaps some hidden dark lust)
Dislikes Nicodemus, any of the rats listening to Mrs. Brisby's "lies" (which weren't lies)
Powers and abilities
Weapons Sword
Fate Sullivan throws a knife at him in the back and he falls to his death into the mud.
Quote "He wanted to destroy everything. I've learned this much: take what you can when you can!" "No taste for blood, eh? They've taken the animal out of you."

Jenner is the main animal antagonist of The Secret of NIMH. He is a rat of NIMH. He betrayed his own kind because instead of leaving to live a better life in Thorn Valley, he'd rather remain in the rose bush. He has an unwilling minion named Sullivan. His goal is to kill Nicodemus and to take away the amulet he gave to Mrs. Brisby. He is voiced by Paul Shenar, who helped Don Bluth alternate the character into making Jenner from a dull character to a sharp villain.

Spoiler warning!
This article contains details of the ending and/or a surprise plot element.

Role in filmEdit

He is first seen arguing with the rats of NIMH about either they should stay in the rose bush or to leave to live in Thorn Valley. When he met Mrs. Brisby, he found "opportunity" in the idea to help move the Brisby home. He "apologized" for the behavior and agreed to help. She was uneasy in his presence, but thanked him anyway. While Mrs. Brisby and Nicodemus were leaving for their boat ride, Jenner planned to sabotage the operation by cutting the ropes that will support the Brisby home, hoping to crush Nicodemus. The plan was a success.

He soon made a speech that one day they'll fulfill Nicodemus' wish and tell them to come and return to the rose bush, but Mrs. Brisby arrived just in time to warn the rats that NIMH are coming. At first, Jenner tries to convince the rats that she was lying, but then he attacked her. Just then, Justin stood in front of him to defend her. When Jenner saw the amulet, he cut Justin's arm and tried to take it from her, nearly strangling her to death. Justin charged in towards him, saved her and fought back, using the sword that Sullivan, who soon got slain by Jenner, tossed to him. The fight lasted a long time until Justin managed to defeat him by stabbing him in the gut. Refusing to lose, Jenner climbed onto the rock and was about to kill Justin. The dying Sullivan throws the dagger into Jenner's back, in which where he fell off the rock to his death.



  • Jenner was voiced by actor Paul Shenar, who portrayed the Bolivian drug lord Alejandro Sosa (Scarface, 1983) and womanizer Alexander Cross (The Mask of Alexander Cross, 1977)
  • In the Graphic Novels - Jenner plotted to have Revenge on Mrs. Brisby and Justin after Dragon the Catfound him outside the Farm.
  • Jenner is somewhat similar to Scar from The Lion King: They both had black fur, both used the female leads as pawns in their plans, (Jenner: Brisby, Scar: Nala*), committed tragic murders to the old rulers and claimed it to be an accident, (Jenner: Nicodemus, Scar: Mufasa), outright admitted to those murders when confronted by the heroes, (Jenner: Justin, Scar: Simba) and got dispatched by their henchmen. (Jenner: Sullivan, Scar: Hyenas).
  • In the novel Mrs. Frisby and the Rats of NIMH, Jenner is a minor character.  He is not seen, except in a flashback narrated by Nicodemus.  In the novel he begins as Nicodemus' friend during the rats' escape from NIMH, but starts to grow apart when he opposes Nicodemus' plan to leave the farm and live independently. Jenner prefers to stay on the farm and slowly drive the humans out.  Eventually he leads a splinter group of rats away to start their own colony.  Later it is heard that a number of rats were found electrocuted in a hardware store, but whether or not this is Jenner's group is uncertain.
  • Jenner is often considered one of the most, if not the most, iconic and popular villains in the Don Bluth filmography.
  • Jenner did not make an appearance in the film until the second half, and he only had six minutes of screen time, but his success in killing Nicodemus darkened the tone for the rest of the film.

*Scar only did this in the Broadway version.

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