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I forgot to mention, I'm planning to blow up the dam with you inside.
~ Cecil to Bob, Bart and Lisa.

Cecil Underdunk Terwilliger is the main antagonist of The Simpsons Season 8 episode Brother from Another Series and the secondary antagonist of the Season 19 episode Funeral for a Fiend. He is the younger brother of Sideshow Bob, and son of Robert Terwilliger Sr. and Dame Judith Underdunk. He also has his sister-in-law named Francesca Terwilliger and his nephew named Gino Terwilliger.

He was voiced by David Hyde Pierce, who also voiced Emperor Zombie in the 2006 pilot of the cancelled Syfy TV show The Amazing Screw-On Head.

History[]

Cecil felt deeply jealous of his older brother Bob, because as children, Cecil was ignored repeatedly by his parents, and instead compared to Bob. As adults, Bob and Cecil didn't talk to each other for years, because Cecil wasn't chosen for Krusty's show during the sideshow auditions. Krusty, Cecil's childhood hero, considered Cecil too unfunny, as soon as he noticed Bob, he chose him as his new sidekick. (Ironically, despite being Cecil being jealous of Bob for getting the part instead of him, Bob later decided to frame Krusty so he could create his own show).

As his introduction story progresses, we discover that he has also hidden criminal behaviors, which have rooted from his jealousy against his brother after what happened in the auditions. As the episode progresses on, Bart and Lisa learns of an embezzlement scheme that will endanger the local hydroelectric dam that is funded for it, and initially believed that Bob was the one who embezzled it, but Cecil reveals himself to be the true culprit as he is holding Bob, Bart, and Lisa hostage with a gun. It was then he revealed his true colors to frame Bob for the embezzlement scheme and blow the dam with him, Bart, and Lisa inside to get revenge for the audition incident walk away clean with the money.

Fortunately, Bob, Bart, and Lisa went on to work together to stop Cecil in his tracks and turned him over to the police, but unfortunately, Chief Wiggum arrests Bob as well, believing him to be involved. As both brothers are taken away, Cecil tricks Bob into swearing revenge on Bart for not defending his innocence, and as Bob fell for it, he realized he just made Bart his enemy again, and angrily holds Cecil responsible for it. Seconds after being imprisoned, the two childishly bickered over who got the top bunk, to which Bob won. Unfamiliar with prison, Cecil asked when the guards brought them menus.

When Bob was later arrested for attempting to kill the Simpsons again, he had taken out a vial of nitroglycerin. Bart, however, thought it was a bomb, and threw it out the window. Bob's father, Robert Terwilliger Sr., claimed it was a cure for Bob's heart condition. In truth, Bob never had any true medical conditions, and his father injected anesthesia into his body. During the "funeral", Cecil was temporarily released from prison on watch by parole officers to attend. After Bob's fake funeral, Cecil came to an unhappy Bart, and persuaded him to make his peace with Bob before his cremation. This led Bart to visit to the funeral house, only to be locked in the coffin by Bob who then tried to burn him up.

The plot was foiled by Lisa and the Simpson family arrived to stop Bob's family. They freed Bart from the coffin, and delayed Bob, Cecil, and the rest of the family by throwing ashes in their eyes. Chief Wiggum and the police arrived and arrested Bob, Francesca, Gino, their parents, as well as reincarcerating Cecil.

Trivia[]

  • As a homage to the television series Fraiser, Cecil is based on David Hyde Pierce's character Niles (brother of Kelsey Grammer's Fraiser Crane).
  • Cecil could easily be the evilest villain of the series as he tried to flood the city and kill his brother and two children (Bart and Lisa). However, he is outranked by Russ Cargill, who is more dangerous and ruthless than Cecil.
  • It is unclear if Cecil is still in prison, since his absence during scenes of his brother in jail. It is likely that Cecil had been released, paroled, or transferred to a different prison. It is also plausible that he escaped.

Navigation[]

               The Simpsons Logo Villains

Springfield Republican Party
Birch Barlow | Lindsey Naegle | Count Dracula | Blue-Haired Lawyer | Waylon Smithers

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

Springfield Mafia
Fat Tony | Fit Tony | Johnny Tightlips | Legs | Louie | Don Vittorio D'Maggio | Frankie the Squealer | Johnny the Snitch | Ned Flanders Sr. | Nicky Bluepants Altosaxophony | Joey | Dante Calabresi Sr. | Dante Calabresi Jr. | Primo | Shotgun Pete

Burns Family
Mr. Burns | Clifford Burns | Wainwright Montgomery Burns | Ironfist Burns

Recurring Characters
Agnes Skinner | Artie Ziff | Baby Gerald | Clancy Wiggum | Constance Harm | Dolph Starbeam | Gina Vendetti | God | Hans Sprungfeld | Herman Hermann | Itchy | Jessica Lovejoy | Jimbo Jones | Jack the Ripper | Kearney Zzyzwicz | Mayor Quimby | Mr. Largo | Patty & Selma Bouvier | Rich Texan | Senator Mendoza | Shauna Chalmers | Snake Jailbird | Space Mutants

Treehouse of Horror
Homer Simpson: III | V | XXII | XIV | XIX | XVIII | XXV | XXVII | XXXIV | The Blob | The Fat in the Hat | Homerzilla | Homer's Clones

Marge Simpson: Witch Marge | XVIII

Bart Simpson: The Raven | II | IV | VII | XVI | XX | XXV | XXXI | XXXII

Lisa Simpson: XXIX | XXXIII | XXXIV

Maggie Simpson: IX | XXX | XXXIV

Mr. Burns: II | XVI | XXVII | XXXI | XXXIII | XXXV | Count Burns | Burnsiverse | Lord Montymort

Waylon Smithers: II | Slithers

Moe Szyslak: XX | Moe-Looking Satan | V | XXV

Sideshow Bob: XXVI | XXXIV

Others: Bart (Fly) | Zombies | Gremlin | Groundskeeper Willie | Jonathan Frink Sr. | Kang and Kodos | Killer Toupée | King Snorky | Killer Krusty Doll | Lard Lad | Muttonchop Murderer | French President | Ned Flanders | Seymour Skinner | Doris Freedman | Edna Krabappel | The Devil | Dr. Julius Hibbert | Billy the Kid | The Grand Pumpkin | The Mutants | Witch Patty & Selma | Rachel | Munchers | Death | The Pookadook | Metaluna Mutant | Steve Johnson | The Collector | Universal Monsters | Ultrahouse 3000 | Pazuzu | The Other Simpsons Family | Bart's Toys | Krusto D. Clown | Lenny Leonard | Carl Carlson | Bad Dream House | Count Dracula | Itchy and Scratchy | Artie Ziff | Snake Jailbird | Jelly Monster | Clancy Wiggum | Gary Chalmers | Mopey Mary | Gypsy | Bart's Treehouse | Political Monsters | Denim | Springfield Fire Department | Luann Van Houten

Other Characters
Adil Hoxha | Adolf Hitler | Andy Hamilton | Baby Button Eyes | Bart Simpson's Creatures | Beautiful Bart | Blue-Eyed Man | Bob Arnold | Captain Mordecai Barrows | Cesar & Ugolín | Chett Englebrick | Clownface | Cooder | Comic Book Guy (Brick Like Me) | Devan & Quenley Woosterfield | Dexter Colt | Dwight Diddlehopper | Environmental Protection Agency (Russ Cargill) | Frank Grimes, Jr. | Francine Rhenquist | French Chef | George H.W. Bush | Glamorous Godfrey | Globex Corporation (Hank Scorpio, Miss Goodthighs) | Hell's Satan | Homer Gimplet | Howard K. Duff VIII | Hypnotoad | Itchy & Scratchy Bots | Jack Crowley | Jack Lassen | Jay G | Joan Bushwell | The Jockeys | Julia | Kostas Becker | Larry Kidkill | Lucille Botzcowski | Lyle Lanley | Les Moore | Jim Hope | Mayor of Albuquerque | Mav & Portia | Michael De Graaf | Molloy | Movementarians | Mr. Dirt | Ms. Cantwell | Ms. Kelp | Nigel Bakerbutcher | Officer Krackney | Pa MacWeldon | Professor Werner Von Brawn | Rex Banner | Robotic Richard Simmons | Rover | Siegfried Blaze | Shadow Knight | Sparklemon | Stanley DeGroot | Stonecutters (Homer Gimplet)| The Leader | William Shakespeare | Paolo Paoletti

Guest Star Characters
Will Wright | Taika Waititi

Video Games
Simpsons Arcade
Mr. Burns | Mr. Smithers | Hench Dogs | Robot Burns

The Simpsons: Hit and Run
Agnes Skinner | Kang and Kodos | Mr. Burns | Patty and Selma Bouvier | Snake Jailbird | Springfield Mafia (Fat Tony & Louie) | Wasp Cameras | Waylon Smithers | Zombies

The Simpsons Game
Matt Groening | Kang and Kodos | Chocolate Rabbits (White Chocolate Rabbit) | Security Guards (The Simpsons Game) | Riot Cops | Tree Loggers | Jimbo Jones | Dolph Starbeam | Kearney Zzyzwicz | EA Executive | Stubborn Ape | King Snorky | Lard Lad | Mr. Burns | Waylon Smithers | Sideshow Bob | Selmatty | Itchy | God

The Simpsons: Tapped Out
Mr. Burns | Russ Cargill | Frankie the Squealer | Sven Holly | Evil Homer | Bandits | Count Dracula | Rich Texan | Fernando Vidal | Grampasaurus | Itchy & Scratchy Bots

See Also
Futurama Villains | Disenchantment Villains

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