That nitroglycerin was medicine for Robert's congenital heart defect.
~ Dame Judith Underdunk lying about her son on trial.

Dame Judith Underdunk is a minor antagonist for the The Simpsons episode Funeral for a Fiend. She is a wife of Robert Terwilliger Sr. and a mother of Sideshow Bob and Cecil Terwilliger. She has a daughter-in-law named Francesca Terwilliger and a grandson named Gino Terwilliger.

She is voiced by Tress MacNeille.


When Sideshow Bob was put on trial for trying to kill the Simpson family, his parents helped him to avoid the prison. At first, Mr. Terwilliger claimed it had actually been Bart who had taunted Bob, causing everyone in the courtroom to believe it is all Bart's fault. When broken Bob pulled out a bottle of nitroglycerin, Bart grabbed it and threw it out of the window (believing it to be a biological weapon). However, Judith Underdunk later revealed it is actually Bob's medicine he needed to cure his mental problems. And as Bart took it away from him, Bob fainted off and "died".

This helped Bob to conduct a complex plan to kill Bart by locking him in Bob's coffin and cremating him. However, this process was stopped by Lisa on time and Bob with his entire family ended up in prison.


  • Gino and she are the only members of the Terwilliger family who aren't voiced by guest stars.
  • As mentioned by Lisa, she is the best classical actress of her generation and her successful career obviously led Bob to love theater and Shakespeare.
  • Sideshow Bob gets his hair from his mother and Cecil's nose is similar to hers.
  • The Dame prefix on her name means that she has been knighted.


          The Simpsons Villains

Springfield Republican Party
Mr. Burns | Waylon Smithers | Blue-Haired Lawyer | Birch Barlow | Lindsey Naegle

Terwilliger Family
Robert Terwilliger Jr. | Cecil Terwilliger | Francesca Terwilliger | Gino Terwilliger | Robert Terwilliger Sr. | Dame Judith Underdunk

Springfield Mafia
Fat Tony | Fit Tony

Environmental Protection Agency
Russ Cargill

Recurring Characters
Itchy| Space Mutants | Patty & Selma Bouvier | Herman Hermann | Nelson Muntz | Jebidiah Springfield | Jimbo Jones | Dolph Starbeam | Kearney Zzyzwicz | Agnes Skinner | God | Jessica Lovejoy | Artie Ziff | Baby Gerald | Wainwright Montgomery Burns | Snake Jailbird | Senator Mendoza | Matt Groening | Constance Harm

Treehouse of Horror
Kang & Kodos | Killer Krusty Doll | Zombies | Ned Flanders | The Devil | Gremlin | Count Burns | Seymour Skinner | Lard Lad | Groundskeeper Willie | Hugo Simpson II | Bart (Fly) | Witch Marge | The Collector | Killer Toupée | King Snorky | Homer's Clones | Billy the Kid | Jonathan Frink Sr. | Muttonchop Murderer | The Blob | The Grand Pumpkin

Guest Star Characters
Black Weasel | Cesar & Ugolín | Adil Hoxha | Lucille Botzcowski | Professor Werner Von Brawn | Bob Arnold | Lyle Lanley | Kindergarten Teacher | Adolf Hitler | Robotic Richard Simmons | The Leader | Movementarians | Francine Rhenquist | Hank Scorpio | Miss Goodthighs | Molloy | Rex Banner | Dexter Colt | The Jockeys | Hell's Satans | Jack Crowley | Cooder & Spud | French Chef | Jim Hope | Larry Kidkill | Howard K. Duff VIII | White Dog | Frank Grimes, Jr. | Captain Mordecai Barrows | Clownface | Simon Cowell | Officer Krackney | Shadow Knight | Baby Button Eyes | Stanley DeGroot | Will Wright | Stubborn Ape | Mr. Dirt | Sparklemon | William Shakespeare | Julia | Andy Hamilton | Devan & Quenley Woosterfield | Comic Book Guy (Brick Like Me) | Bart Simpson's Creatures | Mav & Portia | Blue-Eyed Man | Nigel Bakerbutcher