Phineas and Ferb build a rocket to visit their star.Doofenshmirtz is also in space, seeking revenge on an adolescent nemesis. Phineas and Ferb try to search for Nosey, and Candace tries to become a lifeguard alongside Jeremy. Doofenshmirtz tries to remove all the zinc from the lake's waters.
Meanwhile, with the annoyance of the mid-summer festival, Dr.
Doofenshmirtz creates a machine which sprays the smell of dirty diapers all over the tri-state area.
Meanwhile, Perry the Platypus tries to find out why Dr. Guest voice: Ashley Tisdale as a live-action version of Candace.
Buford challenges Phineas to a thumb-wrestling competition.
Guest voice: April Winchell as Blanca Dishon and Kevin Michael Richardson as P. Otter The Flynn-Fletcher family goes to London, where Candace and Stacy dress up as Sherlock Holmes to bust Phineas and Ferb. Doofenshmirtz plans to move Big Ben to the tri-state area, where Agent Double O-O helps Perry thwart his plan.