Season 22: Episode 20

Season 22: Episode 22

The Simpsons (1989)

Season 22: Episode 21

500 Keys

TMDb

Air Date:

2025-12-06

Genre

Family Animation Comedy

Release Date

1989

End Date

2025

Episode Description

After finding the keys to every door in Springfield, Lisa finds a hidden room beneath the elementary school.

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13

7

Cast

Dan Castellaneta

Nancy Cartwright

Simpsons Roasting on an Open Fire

Bart the Genius

Homer's Odyssey

There's No Disgrace Like Home

Bart the General

The Call of the Simpsons

The Telltale Head

Life on the Fast Lane

Homer's Night Out

The Crepes of Wrath

Krusty Gets Busted

Some Enchanted Evening

Bart Gets an 'F'

Simpson and Delilah

Treehouse of Horror

Two Cars in Every Garage and Three Eyes on Every Fish

Dead Putting Society

Bart vs. Thanksgiving

Bart the Daredevil

Itchy & Scratchy & Marge

Bart Gets Hit by a Car

One Fish, Two Fish, Blowfish, Blue Fish

Homer vs. Lisa and the 8th Commandment

Principal Charming

Oh Brother, Where Art Thou?

Bart's Dog Gets an 'F'

Brush with Greatness

Lisa's Substitute

The War of the Simpsons

Three Men and a Comic Book

Stark Raving Dad

Mr. Lisa Goes to Washington

When Flanders Failed

Bart the Murderer

Like Father, Like Clown

Treehouse of Horror II

Saturdays of Thunder

Burns Verkaufen der Kraftwerk

I Married Marge

Homer at the Bat

Separate Vocations

Bart's Friend Falls in Love

Brother, Can You Spare Two Dimes?

A Streetcar Named Marge

Homer the Heretic

Lisa the Beauty Queen

Treehouse of Horror III

Itchy & Scratchy: The Movie

Marge Gets a Job

New Kid on the Block

Lisa's First Word

Homer's Triple Bypass

Marge vs. the Monorail

Brother from the Same Planet

Last Exit to Springfield

So It's Come to This: A Simpsons Clip Show

Marge in Chains

Krusty Gets Kancelled

Homer's Barbershop Quartet

Homer Goes to College

Treehouse of Horror IV

Marge on the Lam

Bart's Inner Child

Boy-Scoutz 'N the Hood

The Last Temptation of Homer

$pringfield (Or, How I Learned to Stop Worrying and Love Legalized Gambling)

Homer the Vigilante

Bart Gets Famous

Lisa vs. Malibu Stacy

Deep Space Homer

Homer Loves Flanders

Bart Gets an Elephant

Sweet Seymour Skinner's Baadasssss Song

The Boy Who Knew Too Much

Lady Bouvier's Lover

Secrets of a Successful Marriage

Bart of Darkness

Another Simpsons Clip Show

Itchy & Scratchy Land

Sideshow Bob Roberts

Treehouse of Horror V

Bart's Girlfriend

Grampa vs. Sexual Inadequacy

Homer the Great

And Maggie Makes Three

Homie the Clown

Bart vs. Australia

Homer vs. Patty and Selma

A Star Is Burns

Two Dozen and One Greyhounds

The PTA Disbands

Round Springfield

The Springfield Connection

Who Shot Mr. Burns? (1)

Lard of the Dance

The Wizard of Evergreen Terrace

Bart the Mother

Treehouse of Horror IX

When You Dish Upon a Star

D'oh-in' in the Wind

Lisa Gets an 'A'

Homer Simpson in: 'Kidney Trouble'

Mayored to the Mob

Viva Ned Flanders

Wild Barts Can't Be Broken

Sunday, Cruddy Sunday

Homer to the Max

Marge Simpson in: 'Screaming Yellow Honkers'

Make Room for Lisa

Maximum Homerdrive

Simpsons Bible Stories

Mom and Pop Art

The Old Man and the 'C' Student

Monty Can't Buy Me Love

They Saved Lisa's Brain

Thirty Minutes Over Tokyo

Beyond Blunderdome

Brother's Little Helper

Guess Who's Coming to Criticize Dinner?

Treehouse of Horror X

E-I-E-I-(Annoyed Grunt)

Hello Gutter, Hello Fadder

Eight Misbehavin'

Take My Wife, Sleaze

Grift of the Magi

The Mansion Family

Saddlesore Galactica

Alone Again, Natura-Diddily

Missionary: Impossible

Bart to the Future

Days of Wine and D'oh'ses

Kill the Alligator and Run

Last Tap Dance in Springfield

It's a Mad, Mad, Mad, Mad Marge

Behind the Laughter

Treehouse of Horror XI

A Tale of Two Springfields

Insane Clown Poppy

Lisa the Tree Hugger

Homer vs. Dignity

The Computer Wore Menace Shoes

The Great Money Caper

Skinner's Sense of Snow

Worst Episode Ever

Tennis the Menace

Day of the Jackanapes

New Kids on the Blecch

Hungry Hungry Homer

Trilogy of Error

I'm Goin' to Praiseland

Children of a Lesser Clod

Simpsons Tall Tales

Treehouse of Horror XII

A Hunka Hunka Burns in Love

The Blunder Years

She of Little Faith

Brawl in the Family

Sweets and Sour Marge

Jaws Wired Shut

Half-Decent Proposal

The Bart Wants What It Wants

The Lastest Gun in the West

The Old Man and the Key

Tales from the Public Domain

Blame It on Lisa

Weekend at Burnsie's

I Am Furious (Yellow)

The Sweetest Apu

Little Girl in the Big Ten

The Frying Game

Poppa's Got a Brand New Badge

Treehouse of Horror XIII

How I Spent My Strummer Vacation

Bart vs. Lisa vs. the Third Grade

The Great Louse Detective

The Dad Who Knew Too Little

The Strong Arms of the Ma

I'm Spelling as Fast as I Can

A Star Is Born Again

Mr. Spritz Goes to Washington

'Scuse Me While I Miss the Sky

Three Gays of the Condo

Dude, Where's My Ranch?

Old Yeller-Belly

Brake My Wife, Please

The Bart of War

Treehouse of Horror XIV

My Mother the Carjacker

The President Wore Pearls

The Regina Monologues

The Fat and the Furriest

Today I Am a Clown

'Tis the Fifteenth Season

Marge vs. Singles, Seniors, Childless Couples and Teens, and Gays

I, (Annoyed Grunt)-Bot

Diatribe of a Mad Housewife

Margical History Tour

Milhouse Doesn't Live Here Anymore

Smart and Smarter

The Ziff Who Came to Dinner

Co-Dependent's Day

The Wandering Juvie

My Big Fat Geek Wedding

Catch 'Em If You Can

The Way We Weren't

Bart-Mangled Banner

Treehouse of Horror XV

All's Fair in Oven War

Sleeping with the Enemy

She Used to Be My Girl

Fat Man and Little Boy

Homer and Ned's Hail Mary Pass

There's Something About Marrying

On a Clear Day I Can't See My Sister

Goo Goo Gai Pan

The Seven-Beer Snitch

Don't Fear the Roofer

The Heartbroke Kid

Thank God It's Doomsday

Home Away from Homer

The Father, the Son and the Holy Guest Star

The Bonfire of the Manatees

The Girl Who Slept Too Little

Milhouse of Sand and Fog

Treehouse of Horror XVI

Marge's Son Poisoning

The Last of the Red Hat Mamas

The Italian Bob

Simpsons Christmas Stories

Homer's Paternity Coot

We're on the Road to D'ohwhere

The Seemingly Never-Ending Story

Bart Has Two Mommies

Homer Simpson, This Is Your Wife

Million Dollar Abie

Kiss Kiss, Bang Bangalore

The Wettest Stories Ever Told

Girls Just Want to Have Sums

Regarding Margie

The Monkey Suit

Marge and Homer Turn a Couple Play

The Mook, the Chef, the Wife and Her Homer

Jazzy and the Pussycats

Please Homer, Don't Hammer 'Em

Treehouse of Horror XVII

G.I. (Annoyed Grunt)

Ice Cream of Margie (With the Light Blue Hair)

The Haw-Hawed Couple

Kill Gil, Volumes I & II

The Wife Aquatic

Revenge Is a Dish Best Served Three Times

Little Big Girl

Rome-Old and Juli-Eh

The Boys of Bummer

Crook and Ladder

Stop or My Dog Will Shoot!

You Kent Always Say What You Want

He Loves to Fly and He D'ohs

The Homer of Seville

Midnight Towboy

I Don't Wanna Know Why the Caged Bird Sings

Treehouse of Horror XVIII

Little Orphan Millie

Husbands and Knives

Funeral for a Fiend

Eternal Moonshine of the Simpson Mind

E Pluribus Wiggum

Love, Springfieldian Style

Dial 'N' for Nerder

Smoke on the Daughter

Papa Don't Leech

Any Given Sundance

Sex, Pies and Idiot Scrapes

Double, Double, Boy in Trouble

Treehouse of Horror XIX

Dangerous Curves

Homer and Lisa Exchange Cross Words

Mypods and Boomsticks

The Burns and the Bees

Lisa the Drama Queen

Take My Life, Please

How the Test Was Won

No Loan Again, Naturally

Gone Maggie Gone

In the Name of the Grandfather

Wedding for Disaster

Eeny Teeny Maya Moe

The Good, the Sad and the Drugly

Father Knows Worst

Waverly Hills 9-0-2-1-D'oh

Four Great Women and a Manicure

Coming to Homerica

Homer the Whopper

Bart Gets a 'Z'

The Great Wife Hope

Treehouse of Horror XX

The Devil Wears Nada

Pranks and Greens

Rednecks and Broomsticks

Oh Brother, Where Bart Thou?

Thursdays with Abie

Once Upon a Time in Springfield

Million Dollar Maybe

The Color Yellow

Postcards from the Wedge

Stealing First Base

The Greatest Story Ever D'ohed

American History X-cellent

Chief of Hearts

The Squirt and the Whale

To Surveil with Love

Moe Letter Blues

The Bob Next Door

Judge Me Tender

Elementary School Musical

Treehouse of Horror XXI

Lisa Simpson, This Isn't Your Life

How Munched Is That Birdie in the Window?

The Fight Before Christmas

Moms I'd Like to Forget

Homer the Father

The Blue and the Gray

Angry Dad: The Movie

The Scorpion's Tale

A Midsummer's Nice Dream

Love Is a Many Strangled Thing

The Great Simpsina

The Real Housewives of Fat Tony

Homer Scissorhands

The Ned-liest Catch

The Falcon and the D'ohman

Bart Stops to Smell the Roosevelts

Treehouse of Horror XXII

Replaceable You

The Man in the Blue Flannel Pants

The Ten-Per-Cent Solution

Holidays of Future Passed

Politically Inept, with Homer Simpson

The D'oh-cial Network

Moe Goes from Rags to Riches

The Daughter Also Rises

At Long Last Leave

Exit Through the Kwik-E-Mart

How I Wet Your Mother

Beware My Cheating Bart

A Totally Fun Thing That Bart Will Never Do Again

The Spy Who Learned Me

Ned 'n Edna's Blend Agenda

Moonshine River

Treehouse of Horror XXIII

Adventures in Baby-Getting

A Tree Grows in Springfield

The Day the Earth Stood Cool

To Cur, with Love

Homer Goes to Prep School

A Test Before Trying

The Changing of the Guardian

Love Is a Many-Splintered Thing

Hardly Kirk-ing

Gorgeous Grampa

Black-Eyed, Please

Dark Knight Court

What Animated Women Want

Pulpit Friction

Whiskey Business

The Fabulous Faker Boy

The Saga of Carl

Dangers on a Train

Treehouse of Horror XXIV

Four Regrettings and a Funeral

The Kid Is All Right

Yellow Subterfuge

White Christmas Blues

Steal This Episode

Married to the Blob

Specs and the City

The Man Who Grew Too Much

The Winter of His Content

You Don't Have to Live Like a Referee

Days of Future Future

What to Expect When Bart's Expecting

The Yellow Badge of Cowardge

Clown in the Dumps

The Wreck of the Relationship

Super Franchise Me

Treehouse of Horror XXV

Opposites A-Frack

Blazed and Confused

I Won't Be Home for Christmas

The Man Who Came to Be Dinner

Bart's New Friend

The Musk Who Fell to Earth

Walking Big & Tall

The Princess Guide

Waiting for Duffman

The Kids Are All Fight

Let's Go Fly a Coot

Mathlete's Feat

Every Man's Dream

Halloween of Horror

Treehouse of Horror XXVI

Friend with Benefit

Lisa with an 'S'

Teenage Mutant Milk-Caused Hurdles

Much Apu About Something

Love Is in the N2-O2-Ar-CO2-Ne-He-CH4

Gal of Constant Sorrow

Lisa the Veterinarian

The Marge-ian Chronicles

How Lisa Got Her Marge Back

To Courier with Love

Orange is the New Yellow

Monty Burns' Fleeing Circus

Friends and Family

Treehouse of Horror XXVII

Trust But Clarify

There Will Be Buds

Havana Wild Weekend

The Last Traction Hero

The Nightmare After Krustmas

The Great Phatsby (1)

The Great Phatsby (2)

The Cad and the Hat

A Father's Watch

The Caper Chase

Looking for Mr. Goodbart

Springfield Splendor

Whistler's Father

Treehouse of Horror XXVIII

Grampy Can Ya Hear Me

The Old Blue Mayor She Ain't What She Used to Be

Singin' in the Lane

Mr. Lisa's Opus

Frink Gets Testy

Homer Is Where the Art Isn't

3 Scenes Plus a Tag from a Marriage

Fears of a Clown

No Good Read Goes Unpunished

Lisa Gets the Blues

Forgive and Regret

Throw Grampa from the Dane

Flanders' Ladder

Bart's Not Dead

Heartbreak Hotel

My Way or the Highway to Heaven

Treehouse of Horror XXIX

Baby You Can't Drive My Car

From Russia Without Love

Krusty the Clown

'Tis the 30th Season

Mad About the Toy

The Girl on the Bus

I'm Dancing as Fat as I Can

The Clown Stays in the Picture

101 Mitigations

I Want You (She's So Heavy)

Bart vs. Itchy & Scratchy

Girl's in the Band

I'm Just a Girl Who Can't Say D'oh

Woo-Hoo Dunnit?

Crystal Blue-Haired Persuasion

The Winter of Our Monetized Content

Go Big or Go Homer

The Fat Blue Line

Treehouse of Horror XXX

Gorillas on the Mast

Marge the Lumberjill

Livin La Pura Vida

Thanksgiving of Horror

Todd, Todd, Why Hast Thou Forsaken Me?

Bobby: It's Cold Outside

Hail to the Teeth

The Miseducation of Lisa Simpson

Bart the Bad Guy

Highway to Well

The Incredible Lightness of Being a Baby

Warrin' Priests (1)

Warrin' Priests (2)

The Hateful Eight-Year-Olds

The Way of the Dog

Undercover Burns

Now Museum, Now You Don't

Treehouse of Horror XXXI

The 7 Beer Itch

Three Dreams Denied

The Road to Cincinnati

Sorry Not Sorry

A Springfield Summer Christmas for Christmas

The Dad Feelings Limited

Do Pizza Bots Dream of Electric Guitars

Panic on the Streets of Springfield

Mother and Child Reunion

The Man from G.R.A.M.P.A.

The Last Barfighter

The Star of the Backstage

Treehouse of Horror XXXII

The Wayz We Were

A Serious Flanders (1)

A Serious Flanders (2)

Portrait of a Lackey on Fire

Mothers and Other Strangers

Habeas Tortoise

Lisa the Boy Scout

The King of Nice

Treehouse of Horror XXXIII

From Beer to Paternity

Step Brother from the Same Planet

When Nelson Met Lisa

Game Done Changed

My Life as a Vlog

The Many Saints of Springfield

Carl Carlson Rides Again

Hostile Kirk Place

Write Off This Episode

The Very Hungry Caterpillars

Clown v. Board of Education

Homer's Adventures Through the Windshield Glass

Homer's Crossing

A Mid-Childhood Night's Dream

McMansion & Wife

Thirst Trap: A Corporate Love Story

Treehouse of Horror XXXIV

It's a Blunderful Life

AE Bonny Romance

Murder, She Boat

Do the Wrong Thing

Frinkenstein's Monster

Lisa Gets an F1

Clan of the Cave Mom

Night of the Living Wage

Cremains of the Day

The Tell-Tale Pants

The Tipping Point

Bart's Birthday

The Yellow Lotus

Desperately Seeking Lisa

Treehouse of Horror XXXV

Women in Shorts

Treehouse of Horror Presents: Simpsons Wicked This Way Comes

Convenience Airways

Homer and Her Sisters

The Man Who Flew Too Much

The Flandshees of Innersimpson

The Last Man Expanding

P.S. I Hate You

Abe League of Their Moe

Full Heart, Empty Pool

Estranger Things

Thrifty Ways to Thieve Your Mother

Keep Chalm and Gary On

Treehouse of Horror XXXVI

Men Behaving Manly

Bad Boys... for Life?

Sashes to Sashes

The Day of the Jack-Up

Aunt Misbehavin'

Guess Who's Coming to Skinner

Parahormonal Activity

¡The Fall Guy-Yi-Yi!

Irrational Treasure

Homer? A Cracker Bro?

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