[s1e1] Rollercoaster/candace Loses Her | Head

: This episode introduces Phineas’s iconic catchphrase when he notices Perry has disappeared.

(the second half of S1E1) specifically features the family celebrating Candace’s birthday at Mount Rushmore, where Phineas and Ferb attempt to carve her face into the mountain as a "helpful" gift, while Candace nearly loses her mind trying to expose them. [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." [S1E1] Rollercoaster/Candace Loses Her Head