Snapped: Killer Couples (2013)

S2E6 Day of the Living Gelatin!

Title: The Great Gelatin Adventure! Plot: After seeing Candace's dessert club in action, Phineas and Ferb decide to whip up the largest gelatin creation imaginable, enticing Jenny and Stacy to join their fun. In a parallel storyline, Dr. Doofenshmirtz devises a sinister plot to transform Perry into a villainous version of himself!