http://imdb.com/title/tt1825918/

Phineas and Ferb the Movie: Across the 2nd Dimension (TV Movie 2011)
7.6/10 Updated : 2015-08-31
Animation , Action , Adventure , Comedy , Family , Musical , Sci-Fi
Vincent Martella , Ashley Tisdale , Thomas Brodie-Sangster , Caroline Rhea , Richard O'Brien , Dan Povenmire , Jeff 'Swampy' Marsh , Alyson Stoner , Maulik Pancholy ,
Bobby Gaylor , Mitchel Musso , Tyler Alexander Mann , Dee Bradley Baker , Kelly Hu , Olivia Olson
Robert Hughes , Dan Povenmire
78
2011
Perry's worst fear comes true when Phineas and Ferb find out that he is in fact Secret Agent P| but that soon pales in comparison during a trip to the 2nd dimension
where Perry finds out that Dr. Doofenshmirtz is truly evil and successful.