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Villains Wiki
Villains Wiki

Don't you remember? Your ape-like incompetence drove my father insane!
~ Frank Grimes Jr. to Homer.

Frank Grimes Jr. is the main antagonist of the 2002 The Simpsons episode "The Great Louse Detective". He was the son of Frank Grimes and an enemy of Homer Simpson who wants to avenge his father.

Like his father and other characters in the show, he was voiced by Hank Azaria.


After Homer Simpson is subject to several murder attempts, Sideshow Bob is roped in to help him find the perpetrator, who is revealed to be Junior, Homer's mechanic. No one knew of his true lineage until he revealed it to them upon being cornered, he is Frank Grimes Jr., the illegitimate child of Frank Grimes, Homer's old power plant co-worker from the episode "Homer's Enemy".

His dad liked hookers, and one of them gave birth to him. The real reason behind his intent to kill Homer was because he believed that Homer killed his father by driving him insane when Grimes Sr. accidentally killed himself by electrocuting himself while imitating Homer. He also becomes more infuriated in each passing moment he shares with Homer, just like his father. He has yet to reappear in future episodes.

Simpsons Comics

In the story in Simpsons Comics #108, Homer was framed by Mr. Burns for dealing nuclear weapons and arrested. He was cellmates with Sideshow Bob, and they escaped from jail by going through a tunnel in a cell occupied by a masked prisoner. The three fell into Mr. Burns' secret lair, where the mysterious prisoner was revealed to be Grimes. Sideshow Bob then fell on him and both were knocked unconscious. Homer was cleared of his charges while Bob and Grimes were taken back to prison.



               The Simpsons Logo.svg Villains

Springfield Republican Party
Mr. Burns | Birch Barlow | Lindsey Naegle | Count Dracula (The Simpsons: Tapped Out) | 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 | Nicky Bluepants Altosaxophony | Joey | Dante Calabresi Sr. | Dante Calabresi Jr. | Primo | Shotgun Pete

Environmental Protection Agency
Russ Cargill

Globex Corporation
Hank Scorpio | Miss Goodthighs

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

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

Guest Star Characters
Simon Cowell | Will Wright

Other Characters
Adil Hoxha | Adolf Hitler | Andy Hamilton | Bart Simpson's Creatures | Blue-Eyed Man | Bob Arnold | Captain Mordecai Barrows | Cesar & Ugolín | Chett Englebrick | Cooder | Comic Book Guy (Brick Like Me) | Devan & Quenley Woosterfield | Dexter Colt | Dwight Diddlehopper | Francine Rhenquist | Frank Grimes, Jr. | French Chef | Glamorous Godfrey | Howard K. Duff VIII | Ironfist Burns | Jack Crowley | Jack Lassen | Julia | Kindergarten Teacher | Larry Kidkill | Lucille Botzcowski | Lyle Lanley | Les Moore | Mav & Portia | Molloy | Movementarians | Mr. Dirt | Nigel Bakerbutcher | Officer Krackney | Professor Werner Von Brawn | Rex Banner | Robotic Richard Simmons | Shadow Knight | Stanley DeGroot | Stubborn Ape | The Leader | Jay G