The X-Files

Phineas and Ferb build the coolest rollercoaster ever in their backyard!

The boys convert Mom's car into a giant remote-controlled car.

Phineas enters a thumb-wrestling contest with Buford; Candace tries out for the lead in her favorite play.

Candace joins a jousting tournament at the Renaissance festival; the boys build robot clones of themselves to complete more projects.

Candace models clothing created by Phineas and Ferb; the boys cheer up Isabella after her tonsils are taken out.

Phineas and Ferb herd stampeding cattle back to a carnival; the boys create a winter wonderland in the middle of summer.

Phineas and Ferb create a circus for the neighborhood; the boys market a wooden toy version of Perry the platypus.

The boys capture Candace, who is wrapped up like a mummy; Phineas and the Ferb-Tones become a one-hit wonder.

Phineas and Ferb put a big stadium concert together for Dad.

The boys scare Candace with a fake Bigfoot; Phineas and Ferb create treehouses for themselves and Candace.

The boys create a monster truck for Candace to practice her driving skills; Grandpa tells the boys about Badbeard the pirate while on a camping trip.

The boys undermine Candace's birthday gift for their mother; a shrinking sub excursion into Isabella's dog ends up in Candace.

Dr. Doofenshmirtz makes Perry the Platypus jealous with his new nemesis; Phineas and Ferb travel back in time.

Phineas and Ferb get shipped off to reform school; investigative talk show host Morty Williams prepares an eye-opening report on the school.

Phineas and Ferb re-create a chariot race; a reality show records the brothers building a white-water rafting ride.

The boys build a roller-derby rink so that their grandmother can compete against an old rival; Phineas and Ferb take the day off, to Candace's dismay.

Phineas and Ferb unearth a real caveman who falls for Candace; the boys help Buford retrieve his pet goldfish.

Perry tries to destroy traffic cam footage sought by Candace; Phineas and Ferb build the world's largest bowling ball and pins.

The boys create "The F Games" to help Buford and Isabella settle a disagreement; Candace has an encounter with Jeremy's little sister Suzy.

Candace asks Stacey to bust the boys and their new golf course; a teleporter accident switches Perry and Candace's brains.

Phineas and Ferb stumble upon Perry's secret lair; the boys help their grandfather jump a gorge on his motorcycle.

Phineas and Ferb get together with the neighborhood kids to help scare the hiccups out of Isabella.

One of Ferb's ancestors helps a scientist create a monster; Django gets help from the boys creating an art masterpiece.

Phineas and Ferb create a cartoon where they are the heroes and Candace is the villain; the boys create a Rainbow-inator to help Isabella see her first rainbow.

Phineas and Ferb create a rocket ship to explore a star that was named after them.

Baljeet's science project.