Snapped: Killer Couples (2013)

Episode Overview

After watching a hit vampire film with Stacy, Candace is alarmed when she gets bitten by a bat, leading her to fear she might be turning into a vampire. Phineas and Ferb's new inventions only fuel her paranoia, convincing her that she’s transforming from a regular teen into a teenage vampire. Meanwhile, Dr. Doofenshmirtz hatches a scheme to transform the Tri-State Area into a duplicate of Gimmelshtump, hoping it will simplify his plans for domination.