: Phineas and Ferb begin their summer by building a logic-defying rollercoaster in their backyard, setting the "big project" template for the series.
: This episode introduces Phineas’s iconic catchphrase when he notices Perry has disappeared. [S1E1] Rollercoaster/Candace Loses Her Head
In the pilot episode of Phineas and Ferb , several "helpful" recurring features and tropes of the series are established: : Phineas and Ferb begin their summer by