Oh, There You Are, Perry - Swiss Family Phineas.Oh, There You Are, Perry: When Perry is reassigned to a new villain after Dr. Doofenshmirtz is downgraded to a low-level threat, he is ordered to leave the Flynn-Fletcher household and re-locate to the new villain's area; the boys believe Perry has gone missing and try to find him. Meanwhile, after learning of his downgrade, Dr. Doofenshmirtz confront Perry's new nemesis, but ends up accepting an internship with the new villain. Because she kicked him out of the house after tripping over him, Candace blames herself for Perry's disappearance and works with the gang to get Perry back.
Swiss Family Phineas: After becoming marooned on an island after a storm, Phineas and Ferb build an elaborate island tree house as a shelter. Candace goes freaky with getting back home because she wants to get to Jeremy's party on time. Meanwhile in an inactive volcano on the island, Dr. Doofenshmirtz enslaves monkeys to help him start a laundry cleaning business so he can eventually replace all the laundromats in the Tri-State Area with a franchise of "Evilology" institutes. However, Perry's mission to stop him becomes delayed when Baljeet was asked to take care of him during his owners' absence.