Easter egg: On Disc 4, go to the Special Features from the main menu. On this menu, type in 742 (the Simpsons' house number) to view some hidden sketches. (Note: You may have to press Enter between each of the numbers.).
Easter egg: On four episodes, there are secret commentaries. Select one of the following episodes and then select the Special Features menu for that episode. Press '10' at this screen to be taken to a new screen where it offers a hidden second commentary with one of the executive producers. This only works on "Stark Raving Dad" (Disc 1), "Lisa's Pony" (Disc 2), "Separate Vocations" and "Bart the Lover" (both disc 3).
Easter egg: "The Simpsons: The Complete First Season." On disc 3, go to the special features menu. Click "next" to go to the second page. Highlight "Some Enchanted Evening Script" and press left to highlight Bart's T-shirt. If you press enter on your remote, you get to watch an ABC news story on how elementary schools ban Bart Simpson T-shirts.
Easter egg: Go to the menu for this episode, then click up to highlight an alien symbol on the back of the right chair, then click enter for a deleted scene of Moe getting beaten up.
Brake My Wife, Please - S14-E20
Easter egg: Go to episode menu for this episode, then click up to highlight an alien symbol on the back of the left chair, then click enter for a deleted scene.
Easter egg: Go to the menu for this episode then click up to highlight an alien symbol on the back of the right chair then click enter for a deleted scene.
Easter egg: Disc 4, go to the extras menu. Then click up. The letter A at the end of the word extra should go blue, then click enter to see a number of magazine pictures.
Jazzy and the Pussycats - S18-E2
Easter egg: Season 18 disc 1 go to the menu for "Jazzy and the Pussycats". There are 2 hidden Easter eggs on this menu. When you highlight one Easter egg you have to click left to highlight the second Easter egg. Highlight the play episode button, then press up. At the top of the screen on the right should go yellow (click enter to view this) then click left and something should go green (click enter to view).
Easter egg: Season 18 disc 4 go to the episode menu for "You Kent Always Say What You Want". Select play episode and click up. Something on the right at the top will go yellow. Click enter to view a deleted scene. Then it will highlight something in green - click enter for the 2nd deleted scene.
Easter egg: Season 18 disc 3 go to the episode menu for Homerazzi, select Play episode and click up. Something on the right in top screen will go yellow. Click enter to view a deleted scene. Then it highlights something in green - click enter to view a 2nd deleted scene.
Jazzy and the Pussycats - S18-E2
Easter egg: Season 18 disc one. Go to the episode menu for Jazzy and the Pussycats. Click Up and you should highlight something yellow in the top menu - click enter to watch. Then something green should be highlighted in the top screen - click enter to watch.
Treehouse of Horror XVII - S18-E4
Easter egg: Season 18 Disc one go to the episode menu for Treehouse of Horror - Highlight Play episode then click up - then something on the right of the top screen will go yellow - click enter to view a deleted scene.
Easter egg: Season 18 disc one. Go to the episode menu for G.I. (Annoyed Grunt) highlight Play episode and click Up. The right side of the top screen will go yellow. Click enter to view a deleted scene.
Easter egg: There is a hidden sketch on S6 disc 4. Go to the Special Features menu, highlight "Play all deleted scenes with commentary", then press right. A pencil icon will appear. Press enter to see a sketch of the Simpson home made up of squirrels.
Easter egg: On S5 disc 3 go to the menu for Deep Space Homer. Highlight the Play with commentary and then press right. An icon will appear on the right - a picture of Bart's ear. Press enter and you can listen to audio outtakes from James Taylor.
Easter egg: Season 17 Region 2 DVD box set contains some hidden stuff including deleted scenes. They can be accessed by clicking on an episode which brings up the episode menu, then press the up arrow which may highlight a little square. Pressing left or right may select more squares.
Easter egg: Season 6 DVD. Select the last disc, and go to The Who Shot Mr Burns part 1 episode menu. Click up to select the members on the picture and click enter for gunshots.
Easter egg: Disc one: go to the menu for Treehouse of Horror V. Click up to select the numbers in the picture, then press enter to see an eye.
Easter egg: In 'Treehouse of Horror XV', 'All fairs in oven war', 'She Used to Be My Girl', 'Fat Man and Little Boy', 'Mommie Beerest', 'Homer And Ned's Hail Mary Pass', 'Pranksta Rap', 'There's Something About Marrying', 'Goo Goo Gai Pan', 'The 7 beer snitch', 'Don't Fear The Roofer', 'The heart broke kid', 'A Star Is Torn' and 'Thank god it's doomsday' if you go onto the special features thing and highlight play episode and press up a post-it note will be highlighted. Press OK and you will see a deleted scene.
Easter egg: For each episode, push the "+" sign next to the play button. After pushing this, a selection of choices will come up. Whilst you are on "Play Episode", push up. Some sort of symbol will come up on the blue or red chair shaped like >||<. Push play and a deleted scene or a behind the scenes clip will be played. Episodes: "Barting Over", "C.E.D'oh!", "Three Gays of the Condo" and "Brake My Wife, Please" will have the >||< symbol on the red chair whilst episodes: "How I Spent My Strummer Vacation", "Bart vs. Lisa vs. the Third Grade", "The Dad Who Knew Too Little", "A Star is Born-Again", "'Scuse Me Whilst I Miss The Sky", "Old Yeller-Belly" and "The Bart of War" will have the >||< symbol on the blue chair. "Treehouse of Horror XIII" will have the >||< symbol on both chairs. However, the episodes "Helter Shelter", "The Great Louse Detective", "Special Edna", "The Strong Arms of the Ma", "Pray Anything", "I'm Spelling as Fast as I Can", "Mr. Spritz Goes to Washington", "Dude, Where's My Ranch?" and "Moe Baby Blues" don't have the >||< symbol at all meaning no Easter egg for those episodes.
Answer: I'm not sure if this is the one you're thinking of, but an episode of "Ray Bradbury Theatre," called "A Sound of Thunder," dealt with a similar matter: a group of hunters travel back in time to hunt dinosaurs, only to find things have changed when they get back because someone stepped on a butterfly.