Television series appearances
All appearances are either categorized into nonspeaking, minor, or major roles. Since minor is quite a broad category, I'll specify how many scenes he appears in if it's only a few (though I'll only count scenes he speaks in, so he may have more visual screentime than listed). Also, nonspeaking doesn't necessarily mean "background" or even "nonvocal," so some appearances (E.G. Gump Roast, I am Furious Yellow, etc.) may feature him vocalizing (E.G. laughing) without actually speaking. However, most of the nonspeaking appearances listed are just background cameos. This list is currently incomplete.
Season 1
- Simpsons Roasting on an Open Fire - minor (one scene), voice only
- Homer's Odyssey - minor (two scenes)
- There's No Disgrace Like Home - minor
- The Telltale Head - minor (two scenes)
- Life on the Fast Lane - nonspeaking
- Homer's Night Out - minor (two scenes)
Number of speaking appearances: Five
Season 2
- Bart Gets an "F" - minor (one scene)
- Simpson and Delilah - major
- Two Cars in Every Garage and Three Eyes on Every Fish - minor
- Dancin' Homer - minor (one scene)
- Bart vs. Thanksgiving - minor (one scene)
- Bart the Daredevil - nonspeaking
- Bart Gets Hit by a Car - minor
- One Fish, Two Fish, Blowfish, Blue Fish - minor (one scene)
- Homer vs. Lisa and the 8th Commandment - minor (one scene)
- Principal Charming - nonspeaking
- Old Money - nonspeaking
- Brush with Greatness - minor
- Blood Feud - major
Number of speaking appearances: 10
Season 3
- Stark Raving Dad - minor (two scenes)
- Mr. Lisa Goes to Washington - minor (one scene)
- When Flanders Failed - minor (two scenes)
- Bart the Murderer - minor (one scene)
- Homer Defined - minor
- Treehouse of Horror II - major role in If Only I Had a Brain
- Lisa's Pony - minor (one scene)
- Burns Verkaufen der Kraftwerk - major
- I Married Marge - minor (two scenes), flashback
- Homer at the Bat - minor
- Dog of Death - minor
- Brother, Can You Spare Two Dimes? - minor (two scenes)
Number of speaking appearances: 12
Season 4
- Treehouse of Horror III - minor role in King Homer
- Marge Gets a Job - minor
- Homer's Triple Bypass - minor (one scene)
- Marge vs. the Monorail - minor (two scenes)
- Last Exit to Springfield - minor (two scenes)
- So It's Come to This: A Simpsons Clip Show - nonspeaking, archival footage
- Marge in Chains - nonspeaking
Number of speaking appearances: Five
Season 5
- Homer Goes to College - minor (two scenes)
- Rosebud - minor
- Treehouse of Horror IV - minor role in Bart Simpson's Dracula
- Marge on the Lam - minor (one scene)
- Bart's Inner Child - minor (one scene)
- The Last Temptation of Homer - minor
- $pringfield (Or, How I Learned to Stop Worrying and Love Legalized Gambling) - minor
- Lisa vs. Malibu Stacy - minor
- Deep Space Homer - minor (one scene)
- Bart Gets an Elephant - nonspeaking
- Burns' Heir - minor
- Lady Bouvier's Lover - minor (one scene)
- Secrets of a Successful Marriage - minor (one scene)
Number of speaking appearances: 12
Season 6
- Another Simpsons Clip Show - minor (two clips), archival footage
- Sideshow Bob Roberts - minor (one scene)
- Treehouse of Horror V - minor role in The Shinning
- Homer Badman - minor (one scene)
- Fear of Flying - nonspeaking
- Homer the Great - nonspeaking
- And Maggie Makes Three - minor (two scenes), flashback
- Bart's Comet - nonspeaking
- A Star is Burns - minor
- Lisa's Wedding - minor, present (one scene) and future (two scenes)
- Two Dozen and One Greyhounds - minor
- 'Round Springfield - nonspeaking
- Who Shot Mr. Burns (Part I) - major
Number of speaking appearances: Nine
Season 7
- Who Shot Mr. Burns (Part II) - major
- Radioactive Man - nonspeaking
- Lisa the Vegetarian - minor (one scene)
- King-Size Homer - minor (two scenes)
- Mother Simpson - minor
- The Simpsons 138th Episode Spectacular - major in some sequences, new and archival footage
- Team Homer - minor
- Scenes from the Class Struggle in Springfield - minor
- Lisa the Iconoclast - nonspeaking
- Homer the Smithers - major
- Bart on the Road - minor (one scene)
- 22 Short Films About Springfield - major role in his segment with Mr. Burns
- Raging Abe Simpson and His Grumbling Grandson in 'The Curse of the Flying Hellfish' - minor
- Homerpalooza - minor (one scene)
Number of speaking appearances: 12
Season 8
- You Only Move Twice - minor (two scenes)
- The Homer They Fall - nonspeaking
- Burns, Baby Burns - minor
- Bart After Dark - minor (one scene)
- El Viaje Misterioso de Nuestro Jomer - minor (one scene)
- The Springfield Files - minor (two scenes)
- Mountain of Madness - major
- Simpsoncalifragilisticexpiala(Annoyed Grunt)cious - minor (one scene)
- Homer's Phobia - minor (one scene)
- Brother from Another Series - nonspeaking
- My Sister, My Sitter - minor (one scene)
- Homer vs. the Eighteenth Amendment - nonspeaking
- Grade School Confidential - nonspeaking
- The Canine Mutiny - nonspeaking
- The Old Man and the Lisa - minor
- Homer's Enemy - minor (two scenes)
- The Simpsons Spin-Off Showcase - minor
Number of speaking appearances: 12
Season 9
- The Cartridge Family - nonspeaking
- Bart Star - minor (one scene), flashback
- The Two Mrs. Nahasapeemapetilons - nonspeaking
- Lisa the Skeptic - minor (two scenes)
- All Singing, All Dancing - minor (one clip), archival footage
- This Little Wiggy - minor (one scene)
- The Joy of Sect - minor (one scene)
- Simpson Tide - minor (one scene)
- The Trouble with Trillions - major
- Girly Edition - minor (one scene)
- King of the Hill - minor (one scene)
Number of speaking appearances: Nine
Season 10
- Bart the Mother - nonspeaking
- When You Dish Upon a Star - minor (one scene)
- D'oh-in' in the Wind - minor (one scene)
- Mayored to the Mob - nonspeaking
- Viva Ned Flanders - minor (one scene)
- Wild Barts Can't Be Broken - nonspeaking
- Marge Simpson in: "Screaming Yellow Honkers" - nonspeaking
- Maximum Homerdrive - nonspeaking
- Mom and Pop Art - minor (one scene)
- Monty Can't Buy Me Love - minor (two scenes)
- They Saved Lisa's Brain - nonspeaking
- Thirty Minutes Over Tokyo - nonspeaking
Number of speaking appearances: Five
Season 11
- Beyond Blunderdome - nonspeaking
- Brother's Little Helper - minor (one scene)
- Guess Who's Coming to Criticize Dinner? - minor (one scene)
- Treehouse of Horror X - nonspeaking roles in Desperately Xeeking Xena and Life's a Glitch, Then You Die
- Hello Gutter, Hello Fadder - minor (one scene)
- Take My Wife, Sleaze - nonspeaking
- Grift of the Magi - minor (one scene)
- The Mansion Family - minor
- Behind the Laughter - nonspeaking
Number of speaking appearances: Five
Season 12
- Treehouse of Horror XI - nonspeaking role in The Night of the Dolphin
- A Tale of Two Springfields - nonspeaking
- Lisa the Tree Hugger - nonspeaking
- Homer vs. Dignity - minor (two scenes)
- The Computer Wore Menace Shoes - minor (one scene)
- Day of the Jackanapes - minor (one scene)
- New Kids on the Blecch - minor (one scene)
- Tennis the Menace - minor (two scenes)
- Bye Bye Nerdie - nonspeaking, flashback
- I'm Goin' to Praiseland - nonspeaking
Number of speaking appearances: Five
Season 13
- Treehouse of Horror XII - nonspeaking role in opening segment, minor role in Wiz Kids
- A Hunka Hunka Burns in Love - minor (two scenes)
- The Blunder Years - major
- Brawl in the Family - nonspeaking
- Sweets and Sour Marge - nonspeaking
- Jaws Wired Shut - minor (one scene)
- The Bart Wants What It Wants - nonspeaking
- Weekend at Burnsie's - major
- Gump Roast - nonspeaking
- I am Furious (Yellow) - nonspeaking
- The Frying Game - nonspeaking
Number of speaking appearances: Five
Season 14
- Treehouse of Horror XIII - nonspeaking roles in The Fright to Creep and Scare Harms and The Island of Dr. Hibbert
- How I Spent My Strummer Vacation - nonspeaking
- Large Marge - nonspeaking
- Helter Shelter - minor (one scene)
- The Great Louse Detective - nonspeaking, archival footage
- Special Edna - nonspeaking
- The Dad Who Knew Too Little - minor (one scene)
- I'm Spelling as Fast as I can - nonspeaking
- A Star is Born Again - nonspeaking
- C.E.D'oh - minor (two scenes)
- 'Scuse Me While I Miss the Sky - nonspeaking
- Three Gays of the Condo - minor (one scene)
- Dude, Where's My Ranch? - minor (one scene)
- Old Yeller-Belly - nonspeaking
- Brake My Wife, Please - nonspeaking
- The Bart of War - nonspeaking
- Moe Baby Blues - nonspeaking
Number of speaking appearances: Five
Season 15
- Treehouse of Horror XIV - nonspeaking role in Stop the World, I Want to Goof Off
- My Mother the Carjacker - minor (one scene)
- The President Wore Pearls - nonspeaking
- The Regina Monologues - minor (one scene)
- The Fat and the Furriest - minor (one scene)
- 'Tis the Fifteenth Season - nonspeaking
- Marge vs. Singles, Seniors, Childless Couples and Teens, and Gays - nonspeaking
- Diatribe of a Mad Housewife - nonspeaking
- Margical History Tour - minor role in Mozart and Salieri
- The Wandering Juvie - minor (one scene)
- My Big Fat Geek Wedding - nonspeaking
- Simple Simpson - minor (two scenes)
- Bart-Mangled Banner - nonspeaking
- Fraudcast News - minor
Number of speaking appearances: Seven
Season 16
- Treehouse of Horror XV - nonspeaking roles in Four Beheadings and a Funeral and In the Belly of the Boss
- All's Fair in Over War - nonspeaking
- Fat Man and Little Boy - minor (one scene)
- Midnight Rx - major
- Homer and Ned's Hail Mary Pass - nonspeaking
- Goo Goo Gai Pan - minor (one scene)
- The Seven-Beer Snitch - minor (one scene)
- Future-Drama - minor (one scene)
Number of speaking appearances: Five
Season 17
- The Bonfire of the Manatees - minor (one scene)
- Milhouse of Sand and Fog - nonspeaking
- Treehouse of Horror XVI - minor role in Survival of the Fattest
- See Homer Run - minor (one scene)
- The Last of the Red Hat Mamas - minor (one scene)
- The Italian Bob - minor (one scene)
- Simpsons Christmas Stories - nonspeaking role in The First D'oh-el
- We're on the Road to D'ohwhere - minor (one scene)
- The Seemingly Never-Ending Story - nonspeaking
- Bart Has Two Mommies - minor (one scene)
- Million-Dollar Abie - nonspeaking
- Kiss Kiss Bang Bangalore - minor
- The Wettest Stories Ever Told - minor role in Mayflower Madman, nonspeaking role in The Neptune Upending
Number of speaking appearances: Nine
Season 18
- Treehouse of Horror XVII - major role in opening segment, nonspeaking role in The Day the Earth Looked Stupid
- G.I. (Annoyed Grunt) - nonspeaking
- Kill Gil, Volumes I & II - minor (one scene)
- Revenge Is a Dish Best Served Three Times - nonspeaking roles in The Count of Monte Fatso and Bartman Begins
- Little Big Girl - minor (one scene)
- Springfield Up - minor (one scene)
- Yokel Chords - nonspeaking
- Marge Gamer - nonspeaking
- The Boys of Bummer - minor (one scene)
- Crook and Ladder - minor (one scene)
- 24 Minutes - nonspeaking
Number of speaking appearances: Six
Season 19
- He Loves to Fly and He D'ohs - minor (one scene)
- The Homer of Seville - minor (one scene)
- Funeral for a Fiend - nonspeaking
- Eternal Moonshine of the Simpson Mind - nonspeaking
- Love, Springfieldian Style - nonspeaking role in opening segment
- Dial "N" for Nerder - nonspeaking
- Papa Don't Leech - nonspeaking
- All About Lisa - nonspeaking
Number of speaking appearances: Two
Season 20
- Double, Double, Boy in Trouble - minor (one scene)
- MyPods and Boomsticks - nonspeaking
- The Burns and the Bees - minor
- Take My Life, Please - minor (one scene)
- No Loan Again, Naturally - minor (one scene)
- Gone Maggie Gone - minor (one scene)
- Wedding for Disaster - nonspeaking
- Four Great Women and a Manicure - nonspeaking role in Queen Elizabeth I
- Coming to Homerica - nonspeaking
Number of speaking appearances: Five
Season 21*
- Treehouse of Horror XX - nonspeaking role in Dial "M" for Murder or Press # To Return To Main Menu and Don't Have a Cow, Mankind
- The Devil Wears Nada - nonspeaking
- Once Upon a Time in Springfield - minor (one scene)
- Million Dollar Maybe - minor (one scene)
- Boy Meets Curl - nonspeaking
- The Color Yellow - minor (one scene), historical counterpart
- American History X-cellent - major
- The Squirt and the Whale - nonspeaking
- To Surveil with Love - minor (one scene)
- Moe Letter Blues - nonspeaking
- Judge Me Tender - nonspeaking
Number of speaking appearances: Five
* Take with a grain of salt. I'm not completely sure on my count here and I'm in the process of factchecking it.
Season 33
- The Star of the Backstage - minor
- Bart's in Jail! - nonspeaking
- Treehouse of Horror XXXII - minor role in Bong Joon Ho's This Side of Parasite
- The Wayz We Were - nonspeaking
- A Serious Flanders (Part 1) - nonspeaking
- Portrait of a Lackey on Fire - major
- The Longest Marge - minor (one scene)
- You Won't Believe What This Episode is About – Act Three Will Shock You! - nonspeaking
- Bart the Cool Kid - nonspeaking
- Marge the Meanie - minor (one scene)
- Poorhouse Rock - nonspeaking
Number of speaking appearances: Five
Season 34
- Habeas Tortoise - nonspeaking
- One Angry Lisa - nonspeaking
- The King of Nice - nonspeaking
- Not It - nonspeaking, mentioned
- Stepbrother from the Same Planet - nonspeaking
- Top Goon - nonspeaking
- My Life as a Vlog - nonspeaking
- Carl Carlson Rides Again - mentioned
- Bartless - nonspeaking
- Hostile Kirk Place - nonspeaking
- Write Off This Episode - nonspeaking
Number of speaking appearances: Zero