The Simpsons (1989– )
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Trilogy of Error 

Homer loses his thumb and must rush to the hospital for immediate surgery; Lisa tries to make it to the school with her project; Bart obtains illegal fireworks.


Mike B. Anderson (as Mikel B. Anderson)


Matt Groening (created by), James L. Brooks (developed by) | 3 more credits »

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Episode cast overview:
Dan Castellaneta ... Homer Simpson / Barney / Krusty / Mr. Teeny / Teacher / Louie / Itchy (voice)
Julie Kavner ... Marge Simpson (voice)
Nancy Cartwright ... Bart Simpson / Todd Flanders (voice)
Yeardley Smith ... Lisa Simpson (voice)
Hank Azaria ... Moe Szyslak / Linguo / Chief Wiggum / Cletus / Dr. Nick Riviera / Lou / Sea Captain (voice)
Harry Shearer ... Ned Flanders / Rainier Wolfcastle / Dr. Hibbert / Scratchy (voice)
Joe Mantegna ... Fat Tony (voice)
Frankie Muniz ... Thelonious (voice)
Marcia Mitzman Gaven Marcia Mitzman Gaven ... Miss Hoover (voice)
Pamela Hayden ... Milhouse Van Houten / Rod Flanders (voice)
Tress MacNeille ... Agnes Skinner (voice)
Russi Taylor ... Martin Prince (voice)
Karl Wiedergott Karl Wiedergott ... Spooked Soldier / Legs (voice)


The lives of Homer, Lisa and Bart have been split up in a less-than-ordinary day, and as each of their problems unfold, their lives intertwine on a road of chaos and mayhem all over Springfield. Homer's thumb is accidentally sliced off, and he tries to find a way to the hospital; Lisa must find a way to get to the Science fair at school; and Bart and Milhouse discover more than just fireworks in a secret cave... Written by Robert Cathles

Plot Summary | Add Synopsis


Animation | Comedy


TV-PG | See all certifications »






Release Date:

29 April 2001 (USA) See more »

Filming Locations:


Company Credits

Show more on IMDbPro »

Technical Specs

Sound Mix:

Dolby | Dolby SR (seasons 3-19)



Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


This episode has the highest IMDb rating since the Season 9 premiere, "City of New York vs. Homer Simpson" and is also higher than all episodes after it so far (as of January 2018). See more »


When Lisa runs into Marge outside Moe's, Marge claims she stole the car from McBain. She actually stole the car from Rainier Wolfcastle. McBain is a character Rainier Wolfcastle plays on the screen. See more »


Chief Wiggum: [answer machine] 9-1-1. This better be good.
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References Gattaca (1997) See more »


Happy Together
by Gary Bonner and Alan Gordon
Performed by The Turtles
See more »

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User Reviews

one of my all-time favorite simpsons episodes !
18 November 2007 | by Adrian-edelSee all my reviews

to me, a long lasting simpsons veteran, this clip has everything a proper simpsons episode ought to have. the plot is wonderfully crazy and has ingenious ideas, for example lingo, the grammar robot. the splitting up into 3 parts works just fine and gives this episode its unique sign, and somehow this is creating some kind of speed, which makes the story seem tight and enjoyable. almost all the good characters (with a few exceptions) are involved in it, and the jokes are unique and delightful. i can recommend this episode to everyone really, whether you are a simpsons addict, or a greenhorn, this one will make you laugh your a** of :).

10/10, and nothing else

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