Wikisimpsons - The Simpsons Wiki
- The graves of Edna Krabappel ("The Man Who Grew Too Much"), Maude Flanders ("Alone Again, Natura-Diddily"), Frank Grimes ("Homer's Enemy") and Emilie Mercer ("Barthood") all appear in Springfield Cemetery in Bart's dream.
- Lionel Budgie ("Lisa the Veterinarian"), Maxwell Flinch ("The Last Traction Hero"), Anger Watkins ("22 for 30"), Baz (Ned's dog) ("Peeping Mom"), Laddie and Jessica ("The Canine Mutiny") appear.
- Taquito appears, though this is the first time he's named. ("Bart's Comet")
- Homer uses as an excuse being sent to dog heaven for five minutes after dying. ("Dog of Death")
- On Homer's phone, installed apps include:
- Bart tells the story of how the family saved Santa's Little Helper. ("Simpsons Roasting on an Open Fire")
- Mayor Quimby references Rand McNally and how they don't know what state their Springfield is in, breaking the fourth wall. ("Bart vs. Australia")
- The painting "A Friend in Need" is depicted again. ("Treehouse of Horror IV")
- Bart and Lisa visit the Springfield Dog Park. ("The Canine Mutiny")
- This is the second ever episode, consecutive, after Moho House, where the couch gag comes before the title screen, this time though the opening sequence is shown half-fully.
- The chalkboard gag refers to the 28 seasons of the show.
- When Homer is driving home from his shift at the Power Plant, instead of throwing the rod to Otto, he gets stuck in the traffic and opens up the EZcape app to help him get through, thus starting the episode.