[s1e1] Rollercoaster/candace Loses Her Head -

: Perry the Platypus sneaks off to his secret lair to receive a mission from Major Monogram, marking the first time he foils Dr. Doofensmirtz's "Inator."

: This episode introduces Phineas’s iconic catchphrase when he notices Perry has disappeared. [S1E1] Rollercoaster/Candace Loses Her Head

: Phineas and Ferb begin their summer by building a logic-defying rollercoaster in their backyard, setting the "big project" template for the series. : Perry the Platypus sneaks off to his

In the pilot episode of Phineas and Ferb , several "helpful" recurring features and tropes of the series are established: the massive coaster.

: Candace initiates her endless quest to "bust" her brothers by trying to show their mother, Linda, the massive coaster.