

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 Adrianne, 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 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.
- Posters for Simpsons-fied versions of films at the end include:
Continuity