Ignatius then wonders how their platypus came to Africa, but then Ferb says that platypi are synonymous with the word impossible. Baljeet suggests to Buford that he wear the cupid costume, since Isabella begins to say goodbye to her mother as she gets ready to go to college. The salesman tells him they have the same model in yellow. Ferb is set to attend college in the UK, while Phineas narrows his choices down to Danville U, or Tri-State State.

Meanwhile, Doof wants a midlife crisis and builds a Mid-Life Crisis-Inator. After their mom recalls past memories of a wading pool, Ferb and Phineas decided to create a giant inflatable wading pool for her. He shares a strong bond with the family pet, Perry the Platypus, but remains unaware of his double life as a secret agent. In the fourth season episode "Act Your Age", he as a teenager appears to be in a relationship with Vanessa. They also helped Isabella earn her patch by turning the Fireside girls into bees. Doofenshmirtz decides to hit on the cute jump instructor, but she pushes him out of the plane. Perry was actually trying to avoid the boys as he was accidentally sent to Africa.

Perry switches beds in the middle of the night to make it fair between the two (""Steve" is a Chameleon Phineas and Ferb found in their backyard. Phineas and Ferb decide to build a rollercoaster that extends from their backyard to all over town. In the kitchen, Phineas, Ferb, Buford and Baljeet are all making snacks for themselves. Isabella then mentions that she is going to Tri-State State, which makes Phineas' decision about which college to go to easier: he decides to attend her college so they can attend the same place. By: LetMePretendToCare. Phineas gets out of the backseat, and Isabella gets out of her car to ask Phineas what he is doing. Doofenshmirtz decides to hit on the jump instructor, but she pushes him out of the plane. Isabella doesn't seem to have a romantic interest in Ferb like she does with Phineas. Phineas and Ferb returned home and accompanied Isabella to the Night of the Falling Stars dance ("Ferb tested Meap's spaceship out for a run when he was done repairing it. Perry acknowledges her politely and quickly jumps out before she has the opportunity to push him too. They never tried to get their sister in trouble or outsmart their mother and get away with it. ("Ferb is a very intelligent boy who rarely speaks, expressing himself in his actions rather than his words. As a teenager, he looks the same when he was younger, but his hair appears more detailed and scruffy. This excites Doofenshmirtz.

Phineas was concerned that Perry was in the forest of Africa. Dan Povenmire: The show that you're probably watching right now. Ferb suggests that Phineas get in the randomizer booth they'd installed in their room and let fate decide. The pair are visited by Baljeet and Buford, the former an early college graduate and the latter preparing to go off to college himself, and the trio inform the previously oblivious Phineas that Isabella has had a crush on him for years. Emily Ashby of Ed Stetzer, Richie Stanley, and Jason Hayes, author's the book "Backyard Beach," a song Danny Jacob performs as Ferb in the episode " As Isabella walks away and begins to put her paycheck in her wallet, a photo of Phineas drops out. Phineas Flynn is a young boy in the Flynn-Fletcher family. Dan Povenmire: We get letters from kids all over the world asking us questions about the show, that we... Jeff "Swampy" Marsh: No, that's not actually true. Ferb approaches Phineas and commends him for his choice. Phineas tells Nana he is still indecisive about where to go to college. ("On a visit to the beach, Phineas, Ferb, Isabella, Baljeet, Buford, and On Tri-State Area Unification Day, he, Phineas, and their friends decides to hijack the parade to show what Tri-State unification is all about, making giant floats of themselves, and even have Love Händel perform. Doofenshmirtz decides he has had enough of his mid-life crisis and takes the inator off and drops it. Her mom gives Isabella her final paycheck and a hug. She sees Ferb, and joins the group of kids for a short period of time. Isabella tells him she came to say goodbye since she's heading to college early, because she has been accepted into various extracurricular activities at the school. ("The boys decided to create an antique car for Candace. Marsh explained, "It was important to us that [Phineas and Ferb] never did anything with any animosity. They explained summer to the counterparts of themselves, and got trapped by Doofenshmirtz. As Phineas and Isabella kiss, Isabella tells Phineas that it was worth the wait, to which he agrees. Their sister accidentally tagged along though, and the three went on a perilous journey through the galaxy. Off to the side, watching from their car, Vanessa jokingly tells Ferb that she never realized Isabella had a thing for Phineas, to which he replies, "Seriously?".