The Simpsons

Season 11 Episode 4

Treehouse of Horror X

Aired Sunday 8:00 PM Oct 31, 1999 on FOX
out of 10
User Rating
194 votes

By Users

Episode Summary

I Know What You Diddily-Iddly-Did The family (with Marge driving) runs over and believes that they've killed Ned Flanders. After covering up their misdeed, the family is haunted by someone who knows what they diddily-iddly-did, Ned Flanders himself. Desperately Xeeking Xena Lisa and Bart are blasted with radiation, get superpowers and become "Stretch Dude and Clobber Girl". In the episode "Enter...The Collector", they must stop Comic Book Guy (a.k.a. "The Collector") who has kidnapped Xena to add his collection. His collection also includes, Yasmine Bleeth, Doctor Who (Tom Baker), Matt Groening and many other recognizable icons. Life's a Glitch, Then You Die Homer is the nuclear plant's Y2K compliance officer. His negligence causes the Y2K bug to get out and spread across the networks of the world, causing mass destruction. Causing the government's "Operation Exodus" program to be activated, taking the best and brightest off the Earth to a new civilization on Mars.moreless

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  • The Simpsons continues its annual Halloween tradition with the tenth installment of the "Treehouse of Horror" series.

    Though our alien friends Kang and Kodos only have a brief appearance in this episode, it's actually a very well done appearance. What also makes it work is Lisa's very good question of what exactly they have to do with Halloween to begin with. The tenth episode of "Treehouse of Horror" does contain some very good segments. The first, while being quite good, does have a major flaw. If Ned is in fact immortal because he's a werewolf, then why did he not just reveal that once Marge ran him over? The scenes of Homer on the roof with Ned's "dead" body and at the funeral are well done, but the aforementioned question hangs over them. Also, the ending was a little drawn out. The second segment is the best of the three. Lucy Lawless does a very good job in her guest appearance. The climactic battle between Stretch Dude and Clobber Girl and The Collector brings back memories of the old "Batman" series with Adam West and Bert Ward. Loads of fun for sure. The final segment is helped out the most by it's guest appearance by the late Dick Clark. However I did not care for how the catastrophe was set up. When Carl mentioned Homer was the plant's "Y2K compliance officer" it could not have been more obvious that chaos would ensue. Overall, "Treehouse of Horror X" is quite entertaining. Definitely worth your time.moreless
  • great

    I Know What You Diddly-Iddly Did:

    What I liked: Moe calling the Simpsons trying to get Maude's number, Homer singing at the start, Homer trying to convince Maude Ned is still alive, amongst other things.

    However, and I know this is non-canon, but still; I HATE the ending. One of my least favorite endings of the THOHs. I find it absolutely repulsive that Marge and the kids would run away from the werewolf Ned. Bart, Lisa and Maggie I could see, but Marge? Running away with them, and not caring about her husband? Sure, you could use the 'It's a Treehouse of Horror, it doesn't need to make sense', but still. I find it OOC of Marge to not care whether or not her husband lives or dies, despite it being a THOH episode. Desperately Xeeking Xena:

    What I liked: "Xena can't fly!", Comic Book guy as the collector.

    There's not much to this one. Standard comic book parody with a few laughs here and there.

    Life's a Glitch, then You Die:

    What I liked: the havoc that happens at midnight, the celebrities singing, the Simpsons thinking Krusty is dead, amongst other things.

    However, I dislike Lisa's "Mom!" She needs no second to think about it. I mean, obviously she loves her mom but this moment, despite the fact it is a THOH, shows she loves her mom more than anyone else- her father, her brother… I would have liked if she at least tried to get it so that Bart and Homer could go with her. But instead she instantly says "mom" like it's the easiest decision ever.

    Despite me hating the endings to the first segment, and this moment from the last, the THOH from season 11, is overall pretty good. Not one of my favorites, not one of my least favorites.moreless
  • One of the best Treehouse of Horrors!!!!!!!!!

    I know what you Did-iddly-Did: When Marge accidentally runs over Flanders, The Simpsons house is covered with threats like"I know what you did". It turns out Flander turned into a werewolf and was going to kill them anyway. This was a great segment. I loved Homer singing "Yes I forgot to put the foglights in." 8/10

    Stretch Dude and Clobber girl:Bart and Lisa become superheroes. Bart has the power to stretch like a rubber band, and Lisa has super strength. They both save Xena from Comic Book Guy:The collector. I loved the theme song, and all the celeberities The collector had locked up. 8.5/10

    Life's a Glitch, then you Die:On New Year's Eve, Homer forgets the program the Plant's computers and causes Y2K. The world is ending, but luckily the Simpsons get a ticket to start a new civilazation on Mars. Lisa is the only one who gets to go but she Marge as her parent guardian. I loved the ship Homer and Bart went on, that went straight to the sun. 9/10moreless
  • Flanders is a ware wolf, Bart and Lisa become super heros, and the Earth is destroyed.

    Well there is no surprise here that this Tree House of Horror was just as perfect as all the ones that came before it. There were just so many priceless parodies of I know what you did last summer, and Friday the 13th. The Simpsons comedy became definded in episodes like this, and when Moe called Homer on the phone in the first act I couldn't stop laughing. Just a really well put together and cleverly plotted story in which there were so many great jokes it would be impossible not to love this episode. Watch this episode if you love to laugh. A+moreless
  • Best tree house of horror of them all

    This is my favourite tree house of horror episode. It was fantastic and the funniest, firstly I would like to say I Know What you diddily-Iddily did was the best of the three, it was a original tree house of horror it was scary ,funny ,hilarious ,great story line and everything else a fantastic simpson episode needs.

    xeeking xena was the last of my favourite out of the three but it was still excellent. also this was a fantastic idea, bart and Lisa becoming super heroes by being shocked by radiation from a x-ray machine.

    Life's a glitch, then you die was a fantastic idea for a simpson episode because everything goes wrong for homer leaving him trapped on a rocket heading towards the sun.

    As always I announce my favourite quote or scene of the episode, on this episode its got to be in "I know what you diddily-Iddily did" when at the end of the episode homer said " I've never liked that milhouse kid" while trying to run him over by taking over the stearing wheel.moreless
Julie Kavner

Julie Kavner

Marge Simpson, Patty Bouvier, and Selma Bouvier

Harry Shearer

Harry Shearer

Mr. Burns, Ned Flanders, Principal Skinner, Waylon Smithers, Kent Brockman, and others

Dan Castellaneta

Dan Castellaneta

Homer Simpson, Grampa Simpson, Barney Gumble, Krusty the Clown, Groundskeeper Willie, and others

Nancy Cartwright

Nancy Cartwright

Bart Simpson, Nelson Muntz, Ralph Wiggum, Todd Flanders, and others

Yeardley Smith

Yeardley Smith

Lisa Simpson

Hank Azaria

Hank Azaria

Apu Nahasapeemapetilon, Moe Szyslak, Chief Wiggum, Comic Book Guy, Lou, and others

Tom Arnold

Tom Arnold


Guest Star

Dick Clark

Dick Clark


Guest Star

Lucy Lawless

Lucy Lawless


Guest Star

Pamela Hayden

Pamela Hayden

Milhouse Van Houten, Rod Flanders, Jimbo Jones, and others

Recurring Role

Frank Welker

Frank Welker

Santa's Little Helper and Additional Animal Voices

Recurring Role

Tress MacNeille

Tress MacNeille

Agnes Skinner, Brandine Del Roy, Dolph and others

Recurring Role

Trivia, Notes, Quotes and Allusions


  • TRIVIA (11)

    • First Church of Springfield's marquee at Flanders funeral:
      Ned Flanders: Husband, Father, Wacky Neighbor.

    • People on the second rate rocket include Tom Arnold, Pauly Shore, Ross Perot, Dr. Laura, Spike Lee, Dan Quayle, Courtney Love, Tonya Harding, Al Sharpton, and Rosie O'Donnell.

    • People inline for the Exodus rocket include Bill Gates, Ron Howard, Jimmy Carter, Stephen Hawking, Mel Gibson, Paul McCartney, Michael Jordan, Stephen Jay Gould, Michelle Kwan, Mark McGwire, and Professor Frink.

    • One of the aliens in the Centauri City audience looks like Grampa.

    • Unlike other episodes, the director was credited before the script writer.

    • Look closely- in the collectors lair you can see Matt Groening also trapped in a plastic bag- he looks like from the couch gag an episode earlier.

    • Lucy Lawless kicks CBG "The Collector" through the banister but in the next scene the banister is intact.

      Response: The shot was looking at another section of banister.

    • When Nelson is sucked into the copy machine, his shorts are back on (though I guess we should excuse that because of censorship).

    • Maude Flanders sounded completly different in this episode. (This problem would continue until Maude's death)

    • Homer pokes the undead Ned in the eye with a stick through his glasses.

    • When they showed Flanders on the road after Marge runs him over his clothes are fine, but in the flashback his clothes where torn from his werewolf transformation.

  • QUOTES (24)

    • Xena/Lucy Lawless: Must… remove… breast plate!
      (Nerds all take out their cameras)

    • Homer: Hey….we just got away with murder! And it was so easy (sees Milhouse in street) you know… I've never liked that little wiener Milhouse (turns to run over, Marge stops him)
      Marge: No more murders!
      Homer: But you got to kill…
      Marge: No!

    • Guy: Name, please!
      Homer: Certainly. I'm ... the piano genius from the ... movie Shine!
      Guy: Uh huh, and your name is?
      Homer: Uhh, Shiny McShine?

    • Homer: Hello?
      Mysterious Voice: I know you're alone!
      Homer: Uh... who is this?
      Mysterious Voice: Is this... Maude Flanders?
      Homer: No it's Homer...
      Moe: Oh! Hey Homer, it's Moe! I must have dialed the wrong number.

    • Lisa: They're evacuating the Earth! We're saved!
      Homer: Thank you, sweet clown. In death you saved us all.
      Krusty: I'm not dead!
      Homer: I can still hear his voice on the wind.

    • The collector: Good night, Retch Dude and Slobber Girl. Sweet screams! Ha, ha, ha! I'm unbelievably amused.

    • The Collector: Soon those bratty buttinskis will be cased in lucite for all eternity. While we're waiting, here are some names you may call me on my wedding night. Obi-wan, Iron man, Mr.Mxyzplkt, and, of course, big Papa smurf.

    • Cheif Wiggum: They're looting the mall! Hurry! I got nine shoe buffers!

    • Bart: I must only use this power to annoy! (Stretches hand out of window and knocks on door)
      Skinner: Yes... yes? Up? Down? Side to side? What's your point! (Bart's hand slaps Skinner)

    • (as the second-rate celebrities sing)
      Bart: Don't worry, Dad. We'll be dead in five minutes.
      Homer: NOT FAST ENOUGH!
      (Homer pushes the eject button on their seats. The seats take off out of the rocket and they float through the atmosphere. Because of the vacuum of space, their heads grow big and explode.)

    • Rick James: (Singing) Superfreak, superfreak, I'm superfeakin', Yowwwww!
      (Two cops arrest him)
      Rick James: Aww, man, what I'd do now?

    • Homer: We're rubbing elbows with the greats. Look there's Ross Perot. Dr Laura. Spike Lee.
      Bart: Wait, they aren't so great.
      Homer: Well, yeah, but there's Dan Quayle and Courtney Love. Tonya Harding? Al Sharpton?! Aaah! Tom Arnold! What the hell is going on?!

    • Marge: Remember, you're vulnerable to kryptonite!
      Homer: Geez, Marge! Tell the neighborhood!

    • Lisa: Look at the wonders of modern technology now.
      Homer: Wonders, Lisa, or blunders?
      Lisa: I think that was implied by what i just said.
      Homer: Implied or implode?
      Lisa: Mom, make him stop!

    • Dick Clark: And that was Whitesnake playing.
      Rocker: We're Poison.
      Rocker #2: I thought we were Quiet Riot.
      Drummer: It says that we're Ratt.

    • Lucy Lawless: Xena needs Xex!

    • Homer: Oh, no! It's Rosie O'Donnell!

    • Lisa: Bart, just let me drop and save yourself.
      Bart: What do you think I'm trying to do!

    • Lisa: Wait a minute. Xena can't fly!
      Lucy Lawless: I told you, I'm not Xena, Lisa. I'm Lucy Lawless.
      Lisa: Oh.

    • Homer: (Ned's eulogy) What I'd like to say is... we're still looking for the real killers. Anyway in conclusion, a man cannot be forced to testify against his wife--
      Marge: Stop winking!

    • Marge: Homer, did you remember the foglights?
      Homer: Guess I forgot to put the foglights in!

    • Guy: This is a difficult decision. You're only allowed to take one parent with y--
      Lisa: Mom.

    • Homer: (Puppeting Ned) Hi Maude... diddly. I'm helping my friend Homer... diddly.

    • Homer: Okay, Marge, you hide in the abandoned amusement park. Lisa, the pet cemetary. Bart, spooky roller disco. And I'll go skinny dipping in that lake where the sexy teens were killed 100 years ago tonight.

  • NOTES (4)

    • This episode was nominated for the 2000 Golden Reel Award for Best Sound Editing - Television Animation - Music.

    • This episode won the 2000 CINE Golden Eagle Award for Animation.

    • List of the Halloween names used by the staff on this episode:


    • After Homer drops Ned in the Flanders home he says "That's the end of that chapter," which was the catch phrase of the original Homer Simpson character on "Police Cops" in "Homer to the Max".

  • ALLUSIONS (12)

    • Lisa: I don't think the real Radioactive Man wears a plastic smock with a picture of himself on it.
      Milhouse: He would on Halloween!

      This is a reference to the c Halloween costumes from the 1950s to the 1980s manufactured by companies like Ben Cooper Inc. and Collegeville, usually consisting of a simple plastic smock of body suit and a plastic face mask. Usually the smock would have a picture of the character of the costume right on it; Milhouse's Radioactive Man costume consists of a similar plastic mask and a smock with a picture of Radioactive Man saying "Trick-or-treat!" on it.

    • Friday the 13th: In "I Know What You Diddily-Iddly-Did", Homer thinks of hiding in the lake where the teens were killed 100 years ago, just like in this film.

    • "Life's A Glitch, Then You Die" May be a parody of the Y2K scare but it is also a parody of the Steven King film, "Maximum Overdrive" in which the machines start attacking people.

    • There is a Marvel Comic's villain who goes by the name of "The Collector"; an alien being with essentially the same Modus operandi, only he captures superheroes/villains and shrinks them.

    • The episode title "Life's a Glitch, Then You Die" is a reference to the adage "Life's a bitch and then you die".

    • In the bag next to Xena is Tom Baker who was Doctor Who from 1974-1981. To the date of the episode, there were 8 Doctors, with Tom Baker as the fourth being the most recognizable. As of 2006 the total number of incarnations for the character of "The Doctor" is 10.

    • One of the aliens in the audience in the opening scene with Kang and Kodos is a Cylon Centurion from the original Battlestar Galactica.

    • Comic Book Guy: Must end life in classic Lorne Greene pose from Battlestar Galatica. Best death ever.

      Battlestar Galatica was a sci-fi show from the late 70s that starred Lorne Greene.

    • The title of the segment "I Know What You Diddily-Iddly-Did" was inspired from the 1997 film titled I Know What You Did Last Summer. The same instance occured when in the movie as in this episode; Flanders was hit by the car as was the victim in the movie.

    • The rockets leaving a doomed Earth are reminiscent of the 1951 George Pal film When Worlds Collide.

    • Marge: Remember, you're vulnerable to Kryptonite!
      Kryptonite is a mineral from the "Superman" series that is Superman's weakness.

    • Homer: Can't get enough of that Sugar Crisp!
      "Sugar Crisp" was the name of the breakfast cereal that these days is known as "Golden Crisp." Post took sugar out of the product's name when sugar started getting a bad reputation.