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- Candy People
- Ice King
- Fern/Green Knight
- Bandit Princess
- Peace Master
- Pete Sassafras
- Sir Slicer
- The Morrow
- Ricardio's body is reverted back into it's original form, rather than his newer one appearing in "Lady & Peebles."
- The ruins that Fern and Finn visited in "Three Buckets", and that Gumbald has been occupying since "The Wild Hunt", are now the central structure of Gumbaldia.
- Jake mentions the events of "Always BMO Closing" after Finn says they should fix the conflict.
- Finn and Jake mention the events of "Jake Suit" to Gumbald, Lolly, and Chicle.
- Many antagonists from past episodes appear.
- The Squirrel returns from "The Duke", "Princess Potluck", "Hot Diggity Doom", and "Normal Man."
- Ricardio returns from "Ricardio the Heart Guy" and "Lady & Peebles."
- Bandit Princess returns from "I Am a Sword."
- Samantha returns from "The Pit."
- The Peace Master returns from "Nemesis."
- Me-Mow returns from "Jake vs. Me-Mow" and "Angel Face."
- Pete Sassafras returns from "Candy Streets."
- Ash returns from "Memory of a Memory" and "Betty."
- Scorcher returns from "Hitman."
- Sir Slicer returns from "Blood Under the Skin."
- When Gumbald and Finn are on the lift, Gumbald ignores what Finn says and goes on about how Princess Bubblegum will be dead. The third time he says "dead", the lift fails. It's quite likely that "dead" was a signal/codeword for Lolly to cut the lift's rope.
- Chicle turns back into Crunchy due to the Dum Dum Juice. This fits in with his appearance in the future shown in "Graybles 1000+".
- Peppermint Butler gets splashed with Dum Dum Jucie, thus turning him into stupider, baby-like peppermint, and quite possibly causing him to forget his identiy.
- Gumbald has transformed the area around the temple he was seen inhabitng previously in "The Wild Hunt" and "Always BMO Closing", into a Candy City, known as Gumbaldia. It has many similarities to the Candy Kingdom and he seems to have citizens, whom he likely created.
- This episode was released early on the Cartoon Network app on March 9, 2018.