Story about Phineas and Ferb the Movie: Across the 2nd Dimension / 飞哥与小佛的时空大冒险
Phineas and Ferb discover that Perry is a secret agent, and they all get stuck in an alternate dimen...
Phineas and Ferb discover that Perry is a secret agent, and they all get stuck in an alternate dimenion where Doofenchmirtz is the ruler of the tri-state area.
Perry's wort fear comes true when Phineas and Ferb finds out that he is in fact Secret Agent P, but that soon pales in comparison during a trip to the 2nd dimenion where Perry finds out that Dr. Doofenhmirtz is truly evil and successful.