Snapped: Killer Couples (2013)

Episode Overview

Title: Inside the Beast Plot: During the Harbor Days Festival, Phineas and Ferb decide to construct a mechanical replica of the legendary shark said to inhabit Danville Harbor. When Candace discovers their project, she recruits friends to help her catch the enigmatic creature. At the same time, Dr. Doofenshmirtz concocts a device known as the 'Salt Water Taffy-inator,' aiming to give every child in the Tri-State Area a mouthful of cavities.