Their pet platypus, Perry, reveals his double life as a secret agent to thwart Dr. Heinz Doofenshmirtz’s absurd plan to move the Eastern Seaboard with a giant ball of tin foil. Critical Reception & Key Highlights
Their sister, Candace, spends the episode frantically trying to get their mother, Linda, to witness the boys' dangerous activities. Watch Phineas and Ferb S01E01 Rollercoaster Can...
Phineas and Ferb decide to spend their summer day building an impossibly massive, city-spanning roller coaster in their backyard. Their pet platypus, Perry, reveals his double life