Phineas and Ferb - Season 3 - Eps 34: The Remains of the Platypus
Craziness has ensued in Danville and no one has any idea what’s going on. The wackiness unfolds when Phineas and Ferb create Cheesetopia, Doofenshmirtz makes Perry his butler with his Butler-inator, and Carl is trapped by Doof while in a squirrel costume. All is explained, in an episode of Phineas and Ferb that starts at the end and works its way back to the beginning.
About Phineas and Ferb

Title: Phineas and Ferb
First Air Date: 2007-08-17
Last Air Date: 2015-06-12
Status: Returning Series
Rating: 7.873/10 (from 887 votes)
Language: EN
Seasons: 6
Total Episodes: 235
Network: Disney Channel
Genres: Animation, Comedy, Family, Sci-Fi & Fantasy
Production Companies: Disney Television Animation
Synopsis
Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace, who tries to bust them. Meanwhile, their pet platypus plots against evil Dr. Doofenshmirtz.
Cast

Vincent Martella
Phineas Flynn (voice)

David Errigo Jr.
Ferb Fletcher (voice)

Ashley Tisdale
Candace Flynn (voice)

Caroline Rhea
Linda Flynn-Fletcher (voice)

Dee Bradley Baker
Perry the Platypus (voice)

Alyson Stoner
Isabella Garcia-Shapiro (voice)

Dan Povenmire
Heinz Doofenshmirtz (voice)

Jeff 'Swampy' Marsh
Francis Monogram (voice)