The Simpsons (1989– )
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Homer Defined 

Homer is a hero after averting a nuclear meltdown that he nearly caused, but he doesn't want to tell anyone that he stopped it completely by accident.


Mark Kirkland


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

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Episode cast overview:
Dan Castellaneta ... Homer Simpson / Emergency Announcer / Barney Gumble / Grampa Simpson / 'Wheel of Fortune' Contestant / Itchy / Scott Christian / Cop (voice)
Julie Kavner ... Marge Simpson (voice)
Nancy Cartwright ... Bart Simpson / Maggie Simpson (voice)
Yeardley Smith ... Lisa Simpson (voice)
Hank Azaria ... Carl / Apu Nahasapeemapetilon / Moe Szyslak / Instructor / Professor Frink / Male Worker / Chief Wiggum (voice)
Harry Shearer ... Otto / Montgomery Burns / Waylon Smithers / Lenny / Kent Brockman / Jasper / Principal Skinner / Medic / Scratchy (voice)
Maggie Roswell ... Computer Voice / Marguerita / Female Worker / Luann Van Houten (voice)
Pamela Hayden ... Milhouse Van Houten / Shelbyville Plant Computer Voice (voice)
Russi Taylor ... Sherri / Terri / Martin Prince (voice)
Jon Lovitz ... Mr. Avery Devereaux / Aristotle Amandopoulis (voice)
Magic Johnson ... Himself (voice) (as Earvin Johnson Jr.)
Chick Hearn Chick Hearn ... Himself (voice)


Homer prevents a nuclear meltdown,purely by picking a button to press at random, but he is declared a hero and asked to give a talk on plant safety. During the talk he is called upon to prevent another meltdown and exposed as a lucky chancer who only averted an accident by mistake. Marge goes to see Millhouse's mother who has barred her son from seeing Bart,whom she regards as a bad influence,and persuades her to change her mind. Written by don @ minifie-1

Plot Summary | Plot Synopsis


Animation | Comedy


TV-PG | See all certifications »

Parents Guide:

View content advisory »






Release Date:

17 October 1991 (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?


Aristotle Amadopoulos was designed to look like the Greek shipping magnate Aristotle Onassis. His dialogue was written to emulate Lovitz's comedic style, such as his ability for rapid mood swings. See more »


Computer Voice: Warning, core temperature rising.
Homer Simpson: [waking up from his nap] "Core temperature rising"? That sounds serious! Okay, okay, calm down. Whoever's problem this is, I'm sure they know how to handle it...
[He turns, and sees his own board lit up]
Homer Simpson: Ah! It's my problem! WE'RE DOOMED!
See more »


Spoofs My Dinner with Andre (1981) See more »


Written by Edgar Winter
See more »

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User Reviews

Another Brilliant Episode!
11 August 2014 | by g-bodylSee all my reviews

This is the fifth episode of the third season of the Simpsons and so far in the early going, season three looks like to be the best season by far and you can add thanks from this episode. This is cleverly written and pretty darn funny. There is also a semi-serious theme of idiocy in the workplace and how many people in the workforce aren't properly trained.

In this episode, "Homer Defined," Homer saves his power plant from a nuclear explosion by dumb luck and he is regarded as a hero. Homer doesn't feel that great despite what he did. His sheer luck comes in play again when the Shelbyville plant is on the verge of a meltdown.

Overall, this is an excellent episode mainly because the episode focuses on Homer being an idiot, which is always very funny. This episode is definitely not free on the laughs. I rate this episode 9/10.

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