

Irrational Treasure/References
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Cultural references
- The episode title and plot is a reference to the film National Treasure.
- Professor Cage is a reference to Nicolas Cage, who starred in the film.
- Statesman Benjamin Franklin is also a central figure to the plot of the film.
- One of the posters in the end credits is of Homer Simpson in National Treasure.
- Noah Wyle, Katherine LaNasa, and Taylor Dearden guest starring as emergency room staff is a reference to their starring roles in The Pitt.
- Marge uses Amazon Alexa.
- The St. Bernard of Assisi Medical Center is named after the St. Bernard dog breed and Bernard of Quintavalle, who was from Assisi.
- There are numerous references to the Rocky franchise:
- During the training montage, "Far from Over" by Frank Stallone plays.
- Men's Best Friend's Health is a parody of Men's Health.
- Bart mentions the Liberty Bell. A picture of the bell later appears on the "simple diagram" presented to Homer by the H.O.A.G.I.E. Men.
- Numerous references to the Philadelphia Eagles team are made:
- Homer references:
- The 1968 game where the fans threw snowballs at Santa Claus.
- Fans climbing street lamps after the 52nd Super Bowl.
- Lenny Dykstra learning to be crazy.
- The "Tush Push" play.
- In his list of activities to do in Philadelphia there is "ripping off a piece of Jason Kelce's beard".
- He throws a battery at Adrienne, the "Philadelphia Handshake", a reference to fans throwing stuff at the opposing team.
- Gritty appears.
- Mentioned (and then visited by him and the Historians of America's Great Inventors and Enlightened Men) in Homer's list of awesome things for him to do in Philadelphia:
- The Michael Vick Reparation Park is named after college football coach and former professional football player Michael Vick. Vick was arrested and sentenced to 21 months in federal prison for his involvement in a dog fighting ring.
- Philadelphia's welcome sign says "The Big Scrapple", a pun on "The Big Apple", New York City's nickname and scrapple.
- The person welcoming Marge to the hotel tells her:
- Homer thinks that Santa's Little Helper is trying to win the Kentucky Derby.
- The Greater Philadelphia Convention Hall and Oates Parking Lot is a reference to Philadelphia pop rock duo Hall & Oates.
- Professor Cage refers to Santa's Little Helper as a "canus ex machina", a reference to deus ex machina
- Other places visited by Homer and the H.O.A.G.I.E. Men:
- Paintings on display at the Philadelphia Museum of Art include:
- Homer asks the H.O.A.G.I.E. Men if Benjamin Franklin played for the Sixers.
- According to the H.O.A.G.I.E. Men, Benjamin Franklin only pretended to negotiate the Treaty of Paris in 1783 and he stole millions in gold from the Palace of Versailles.
- Homer and the H.O.A.G.I.E. Men go down the river on a University of Pennsylvania rowing boat.
- The Extinguish, or Die banner is a parody of the Join, or Die political cartoon by Benjamin Franklin.
- Benjamin Franklin's riddle refers to Betsy Ross as the first sewer. Ross is widely credited to have sewn the first flag of the United States of America.
- Homer identifies the Betsy Ross House as being at 239 Arch Street. He passed the house multiple times while searching for M. Night Shyamalan's grave.
- A reenactment of the Super Bowl LII riot on Broad Street takes place.
- Homer and Marge see the Mummers Parade going through Philadelphia.
- The whole family wanted to dye Santa's Little Helper green for Saint Patrick's Day.
- Adrienne shouts "Go, birds." while falling in the hole, the Philadelphia Eagles's slogan.
- Posters for Simpsons-fied versions of films set in Philadelphia at the end include:
Trivia
- The entire intro from the "P" zooming into Bart writing "I will not have A.I. these write for me" in school and the couch gag of an injured Homer entering the house after getting hit by Marge's car, all injured, asking why they're just sitting there after it and why it happened is cut from broadcast and only appears in the Disney+ and Hulu version.
Continuity