Episode Title:Rollercoaster - Candace Loses Her Head.Episode Description:Rollercoaster: Phineas and Ferb build a roller coaster for the neighborhood, much to their sister Candace's displeasure. Meanwhile, Perry, the boys' secret agent platypus, tries to stop his nemesis Dr. Doofenshmirtz from controlling the Earth's rotation with a magnet and a giant sheet of tin foil.
Candace Loses Her Head: The boys plan to carve Candace's face into Mount Rushmore for her birthday. Perry tries to prevent Doofenshmirtz from boring a tunnel to the People's Republic of China from Mount Rushmore.