The Dream Begins

The very first episode of Phineas And Ferb Forever. Phineas and Ferb build a dream machine to give you a dream that you choose.

Summary
Phineas and Ferb start the day in the backyard, scanning blueprints for new ideas and scrapped ideas from 5 summers ago. Phineas is taller and now wears a blue shirt with green pants. Meanwhile Ferb is still a bit taller than Phineas and wears the same clothes. Phineas points out a blueprint of a dream machine. And he and Ferb start building.

Meanwhile, Perry opens a portal and steps into his lab, being greeted by Major Monogram, who explains, as usual, what Dr. Heinz Doofenshmirtz is doing.

Perry takes off as the screen goes back to Phineas and Ferb, Isabella didn't show up, due to her moving. Phineas puts the parts on the machine and Ferb tests it out. Buford comes and rips the machine off of Ferb, telling him that whatever it was, he wanted it more. He dreams of having a darkened room filled we Dith junk food. Buford wakes up and exclaims that it works.

Meanwhile, Perry is trapped in a case and Doofenshmirtz is explaining his new invention. The Nightmare-inator. Giving people nightmares due to one he had recently. He activates it, and it carooms off a building and torward Phineas and Ferb's house. He says his line from rollercoaster "Hm, well that didn't work."

The machine hits the Dream Maker and Ferb instantly gets a nightmare. Meanwhile Perry crushes the Nightmare-inator and another beam shoots the Dream Maker again, making it explode. Ferb gets up, stunned, as Perry comes back.

Trivia
The line "Hm, that didn't work" is from Rollercoaster.

The episode name is a parody of the first episode of Invader Zim 'The Nightmare Begins'