Phineas and Ferb - Season 3 - Eps 36: Perry the Actorpus
The executive of Totally Tools oversees a contest to find the company's \"spokesanimal\", and Perry is crowned the winner. However, the victory puts Perry's secret identity in jeopardy, forcing Major Monogram to appoint Agent S as a temporary replacement, but when Dr. Doofenshmirtz sees his new nemesis is Sergei the Snail, he mistakenly underestimates his new opponent. Meanwhile, Candace has been welcomed into Mandy's "Stop the Busting" retreat, which aims to teach Candace to control the urge to bust her brothers through positive reinforcement.
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)