Of course it's Cinnamon Bun who kickstarts the undead uprising. I mean, who else? And when Princess Bubblegum is sidelined, who does that leave to fix things? Finn, Jake, LSP and Lady Rainicorn, none of whom know what they're doing in PB's lab. So, 'From Bad to Worse' is as apt as title names come. And overall, it's a great Halloween episode, and pretty much exactly the sort of zombie installment you can expect from this show. Sight gags abound when the group starts testing their antidotes, with the zombies not only gaining muscles, but eventually wings.
It's another episode stolen by Lumpy Space Princess, but never fails to entertain.
7/10