User blog comment:Mobo85/Hot off the Presses: "Across the Second Dimension" Debuts August 5/@comment-406459-20110620201728

Some random info from Dan and Swampy- or at least, a member on the Television Without Pity formus who interviewed them at E3:

"Phineas and Ferb are somehow accidently blown onto Dr Doofenshmirtz's landing and break his latest invention. Not realising he is evil they help him rebuild the device and make it better, while Perry, who can't reveal his secret agent status to them, does his best to stop them like a regular pet would I.E. peeing on things, though the creators may have been joking about that part. The device ends up creating a portal to another dimension where a competant evil Dr. Doofenshmirtz has already taken over the tri-state area. He captures the pair, throwing them into a dungeon with a Goozim, and then go to their universe to try and take over their tri-state area. The creators also revealed that there are somewhere between 6-8 songs in the movie...Phineas and Ferb will find out about Perry and it changes their whole view of him, they won't know how to deal with it and if they can trust him because of how long he's been lying to them about being a platypus that doesn't do much. We will get to find out about Perry's real relationship with the family, if he is really their pet or they are just his host family, and we will get to see how he got recruted into the agency." He also mentions they said a few things about future plot points they may use on the show, such as flashing back to when Doofenshmirtz was married to Charlene and the possibility that the reason Monogram sends Agent P to stop Doofenshmirtz every day may have something to do with animosity between the two rather than just Monogram doing his job.