Even Simpsons obsessives who watch each episode repeatedly might not know everything about the beloved animated series. Here are 12 hidden gems from Springfield.
1. There's a Full, Hidden McBain Movie
Throughout the series, intermittent clips of action star Rainier Wolfcastle's character McBain pop up when the Simpsons are watching TV. Turns out, these clips can be pieced together to form an entire McBain movie with a structured narrative. Check it out above.
2. Principal Skinner is Jean Valjean from Les Miserables
Here's a highbrow Simpsons theory: In an episode from season five, Principal Skinner reveals that his POW number in Vietnam was 24601, the same number as Les Miserables character Jean Valjean. Four years later in the season nine episode "The Principal and the Pauper," it is revealed that Skinner was a former criminal who stole another man's identity and became a respectable member of society, echoing Valjean's story.
3. Extremely Complex Math Jokes Are Hidden Throughout the Show
The Simpsons is written by math whizzes, and they hide all sorts of complicated math jokes for eagle-eyed and egg-headed viewers, including a split-second moment in season ten's "The Wizard of Evergreen Terrace" when Homer (nearly) successfully disproves Fermat's last theorem.
4. In the Opening Credits, Maggie's Scanner Price Isn't Random
In the original opening credits, when Maggie is swiped on the register, the till reads $847.63. This amount comes from a survey which said that $847.63 is the cost of raising a baby in America per month.
5. Holy Hands
God and Jesus are the only Simpsons characters to have five fingers on each hand. Everyone else has four (of course).
6. The reoccurring "A113"
At various points in the series, "A113" has been used as the inmate/mugshot numbers for Krusty, Sideshow Bob, and Bart. The number itself is a reference to a room at the California Institute of the Arts and it has been used by many Cal Art alumni in other animated shows and Disney/Pixar movies.
7. Professor Frink's Hidden Boast
In the episode "Treehouse of Horror VI," Homer goes into a three-dimensional world. At one point, located behind him is a string of hexidecimal numbers: 46 72 69 6E 6B 20 72 75 6C 65 73 21. When converted to ASCII, these numbers read, "Frink rules!" in reference to Professor Frink.
8. Danny Elfman's Storefront
The name of The Simpsons' theme song composer Danny Elfman is hidden on a storefront in the opening credits (as his theme begins to play).
9. Matt Groening Signs Homer
Homer's hair and ear form an "M" and a "G," which is a reference to Simpsons' creator Matt Groening. The Simpsons make note of this in a season 16 episode.
10. Krusty the Clown and Homer Simpson Have Nearly Identical Character Models
Ever notice that Homer looks like Krusty, sans makeup and hair? You are not alone. Dan Castellaneta (who voices both Krusty and Homer) said that they considered a plotline in which Krusty was going to use Homer as a disguise.
Also, some armchair psychiatrists theorize that Homer and Krusty's similarities are meant to be a central component of Bart's character. He doesn't respect Homer, but he idolizes a man who looks just like him. Deep.
11. Paul McCartney's Hidden Lentil Soup Recipe
In the season five episode "Lisa the Vegetarian," Paul McCartney says, "In fact, if you play ‘Maybe I’m Amazed’ backwards, you’ll find a recipe for a ripping lentil soup.” The joke doesn't end there—if you play the version of "Maybe I'm Amazed" that's featured in the closing credits backwards, you can hear Paul quietly recite a recipe for lentil soup in the background.
12. The Simpsons' Secret Cameos
Seasons two and three featured cameos from superstars Dustin Hoffman and Michael Jackson. But the men weren't credited for their appearances for contractual reasons. The Simpsons later referenced these incidents in a season four episode. In "Itchy & Scratchy: The Movie," Lisa talks about the new Itchy & Scratchy movie saying, "It was the greatest movie I've ever seen in my life! And you wouldn't believe the celebrities who did cameos. Dustin Hoffman, Michael Jackson ... of course they didn't use their real names, but you could tell it was them."
Corrections: As commenters have correctly pointed out, an original version of this article had incorrect season numbers for "Stark Raving Dad," "Lisa's Substitute," and "Itchy & Scratchy: The Movie." D'oh!