As the two boys are sitting underneath the cây in the backyard, Phineas tells Ferb that one of the best times they ever had was when they built the rollercoaster. He proposes that they do it again, only this time as a musical— breaking into spontaneous âm nhạc and choreography without a discernible âm nhạc source. Ferb wonders if they would have any assurance that everyone else would break into song and dance along with them. Phineas thinks they probably will, so Ferb accepts. Phineas then starts hát the first musical number xin chào Ferb (I Know What We're Gonna Do Today).

Linda tells Phineas...

Perry crashed through the roof and landed right inside a glass cage. Before he could do anything, the hàng đầu, đầu trang of the cage closed, and Perry scowled. Doofenshmirtz had an uncanny ability to predict the exact place where Perry was going to break in. It was his one real skill.

He could see Doofenshmirtz on the other side of the room, adjusting a big Inator. After a few seconds, Doofenshmirtz finished what he was doing and turned around. "Ah, Perry the Platypus. How good of bạn to... Drop in!" He laughed manically for a second, then got down to business. "You know, I've told bạn a lot of backstories...

Attack of the 50-Foot Sister
Phineas and Ferb help Baljeet with his Festival entry while Candace aspires to be the tiếp theo Flawless Girl. Dr. Doofenshmirtz plans to cover the Festival with the "worst smell in the history of mankind".

While Candace and Stacy are watching ti vi in Candace's room, with a song called "Flawless Girl". Candace states that she'd be so Mất tích without Flawless Girl, and she sees a commercial on ti vi saying that Blanca, the company's founder, will be attending The Midsummer's Festival. Candace decides to sign up to be the tiếp theo Flawless Girl. Meanwhile, Phineas...