The book-burning device is set to 451 degrees Fahrenheit.
"Starfleet Federation" flag seen
Homer: I feel like Beethoven when Charles Grodin finally accepted him as his dog.
Referenced in the Michael Bay math video
Mentioned that George Bush used to live next door to the Simpsons
On the chalkboard, Bart writes: "I will not fight the future." "Fight the Future" was also the subtitle of the first "X-Files" movie.
Willie's hat is the same one worn by Gandalf in "The Lord of the Rings"/"The Hobbit" movies.
Rick and Morty appear in the couch gag
Sorting hat joke
Nelson watches a parody on BHO