From Bad to Worse

"From Bad to Worse" is the thirteenth episode in season three of Adventure Time.

Synopsis
When another plague of Candy Zombies arises and Princess Bubblegum is among the undead, Finn and his friends are in a race against time to figure out how to stop it...without making things even worse!

Plot
The episode begins with Finn, Jake, and Lady Rainicorn running from Candy Zombies and just barely escaping to the Castle in the Candy Kingdom. They see Lumpy Space Princess there along with Princess Bubblegum. They are informed that while Princess Bubblegum was experimenting with candy zombie tissue, Cinnamon Bun ate it out of hunger and then infected the entire Candy Kingdom while Princess Bubblegum escaped.

Princess Bubblegum then says that she is coming up with a cure, but a candy zombie bursts through the window and bites her on the shoulder. She tells Finn to use Science but, before she can explain, she is dragged out of the window and turns into another zombie. Finn then says they will have to make there own formula to cure her and the Candy Kingdom. Finn tests his cure on a candy zombie but with horrible results. The candy zombie grows wings and infects the other zombies with the same liquid giving them wings as well.

Finn and the rest of the group escape to the top of the castle to continue to try and cure the zombies. Lumpy Space Princess then drops her formula on to some of the zombies, but it does nothing but give them enlarged lips. LSP wants this to happen to her and ends up getting turned into a zombie herself. Jake and Lady Rainicorn then test their formula, but it only makes the zombies stronger. The candy zombies use their new abilities to reach the top of the castle and attempt to bite the group. The zombie infection gets to Jake, and Lady Rainicorn lets him out, only to be bitten. Then, the candy zombies break through to the lab, and Finn locks himself in the science shower. He then realizes that Science is Princess Bubblegum's rat. Science creates the antidote and Finn tests it on Jake. He covers himself with it, and jumps into the crowd of zombies. Then it shows all the candy people back to normal, and we see Princess Bubblegum awarding Science with a medal.

Major Characters

 * Finn
 * Jake
 * Princess Bubblegum
 * Lady Rainicorn
 * Lumpy Space Princess
 * Science

Minor Characters

 * Candy Zombies
 * Cinnamon Bun
 * Chocoberry
 * Banana Guard
 * Pineapple Guy
 * Mr. Candy Cane
 * Chocolate Bar Guy
 * Peppermint Butler
 * Starchy
 * Snail

Trivia

 * Along with "The Creeps," this episode aired as part of Cartoon Network's 2011 Halloween programming event.
 * This episode involves the candy zombie plague that first appeared in "Slumber Party Panic".
 * A few minutes of this episode were previewed at the Adventure Time/Regular Show panel at New York Comic Con 2011.
 * This is the third time Lady Rainicorn calls a character by name. In "Video Makers," she calls Jake while using Korean, pronouncing his name as closed to English pronunciation. In "The Creeps," She refers Jake, pronouncing like a transliterated name into Korean. However, in this episode, she uses a perfect English pronunciation to call Jake.
 * Weirdly, while many of the new infected zombies were not among the undead in "Slumber Party Panic", Starchy is the opposite: he was a Candy Zombie in the original, yet makes it out unharmed in this episode.
 * This is the first time where Lady Rainicorn is referred to as "L.R." by Finn.
 * The plague is caused by Cinnamon Bun eating the zombie flesh, however, in Slumber Party Panic, when the Candy People ate the candy from inside the zombies, they were unaffected.
 * One thing to go unexplained in this episode is how Mr. Candy Cane got large muscles even though he was stuck in the locker at the time.
 * The sticker on Science's cage is a reference to the AMC zombie drama, "The Walking Dead."