If you can't see the video and only hear the sound, please switch to Firefox/Chrome/Safari for better performance.

Phineas and Ferb the Movie: Across the 2nd Dimension

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.