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Jack Lassen is the main antagonist of The Simpsons episode "Blazed and Confused".

He stands out as one of the show's more active antagonists who is openly criminal and homicidal. He also grows to become a nemesis to Bart Simpson and, briefly, Sideshow Bob's partner-in-crime.

He was voiced by Willem Dafoe, who also played Raven Shaddock in Streets of Fire, Eric Masters in To Live and Die in L.A., John Geiger in Speed 2: Cruise Control, Max Schreck in Shadow of the Vampire, the Green Goblin in Sam Raimi's Spider-Man trilogy and Spider-Man: No Way Home, Armando Barillo in Once Upon a Time in Mexico, Nikolai Diavolo in James Bond 007: Everything or Nothing, George Deckert in xXx: State of the Union, Lord Cob in Tales from Earthsea, Rat in Fantastic Mr. Fox, J.G. Jopling in The Grand Budapest Hotel, Ryuk in Netflix's Death Note, Thomas Wake in The Lighthouse and Clement Hoately in Nightmare Alley.


Jack Lassen begins as a new teacher at Springfield Elementary School and quickly shows himself to be unstable, scarring himself with a letter opener in Principal Skinner's office and later making Nelson cry after brutally harassing the would-be-bully after Nelson tried to make fun of his name.

Despite his dangerous nature and Milhouse advising Bart to "abort prank" Bart decided to try his luck and attempted to scare Lassen with a harmless prank. This backfires horribly and Lassen shaved Bart's hair as punishment, despite concerns by Marge the bullying continues and Bart is constantly humiliated and even electrocuted.

Finally growing tired of his tormentor, Bart formed a plan to rid himself of Lassen and spied on him, learning of the "Burning Guy" celebration (a parody of the "Burning Man" Festival) in which Lassen would perform the honor of burning the statue.

Thus, Bart and Milhouse team up to cover the "Burning Guy" statue in fire retardant, which causes Lassen to be publicly humiliated during the celebration as he is unable to set the statue on fire.

Unfortunately, while laughing at Lassen's well-deserved punishment, Bart accidentally knocks over a canister of fire retardant, which rolls over to Lassen and reveals Bart's involvement. This prompts Lassen to go on a murderous rampage with a tuba-based flamethrower, chasing Bart up to the top of the "Burning Guy" in plain view of the entire crowd, which the intention of burning Bart alive.

Homer tries to save Bart by launching himself off a catapult and while he failed at his goal of knocking Lassen off his crash into the statue did cause the structure to collapse, Lassen is then captured by the other festivity-goers, who form a "human prison" around him.

Later Lassen is fired from his teaching position and finds work as a prison warden (a job that he claims would reward his sociopathic tendencies). While working, he comes across Sideshow Bob and the pair almost team up upon stating mutual hatred of Bart but quickly refuse such an alliance when Lassen suggests the pair "share" in the act of murdering Bart, Sideshow Bob wishing to do the act himself.



               The Simpsons Logo.svg Villains

Springfield Republican Party
Mr. Burns | 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 | 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 | Jack the Ripper | 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 | Zombies | Gremlin | Groundskeeper Willie | Homer's Clones | Hugo Simpson II | Jonathan Frink Sr. | Kang and Kodos | Killer Toupée | King Snorky | Killer Krusty Doll | Lard Lad | Muttonchop Murderer | Ned Flanders | Seymour Skinner | The Blob | The Devil | Dr. Julius Hibbert | Bill the Kid | Moe-Looking Satan | The Grand Pumpkin | Witch Marge | Rachel | Maggie Simpson

Guest Star Characters
Simon Cowell | Will Wright | Bill Cipher | Variant L1130

Other Characters
Adil Hoxha | Adolf Hitler | Andy Hamilton | Baby Button Eyes | Bart Simpson's Creatures | 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 | Frank Grimes, Jr. | Francine Rhenquist | French Chef | Glamorous Godfrey | Howard K. Duff VIII | Ironfist Burns | Jack Crowley | Jack Lassen | Julia | Hell's Satan | Kindergarten Teacher | Larry Kidkill | Lucille Botzcowski | Sparklemon | Lyle Lanley | Les Moore | Jim Hope | Mav & Portia | Molloy | Movementarians | Mr. Dirt | Nigel Bakerbutcher | Officer Krackney | Professor Werner Von Brawn | Rex Banner | Robotic Richard Simmons | Shadow Knight | Stanley DeGroot | The Leader | William Shakespeare | Jay G | Kostas Becker

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

The Simpsons Game
Matt Groening | Lard Lad | God | King Snorky | Patty & Selma Dragon | Stubborn Ape

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