Alyson Stoner and Vincent Martella pop their heads out of an airstream bus during the “Perry the Platy-bus On Tour” stop at Navy Pier on Wednesday afternoon (August 8) in Chicago, Ill.

The two actors, who voice Isabella and Phineas on Phineas and Ferb, were joined by creators Dan Povenmire and Jeff “Swampy” Marsh.

During the Platy-bus experience, fans of the hit series can virtually interact with characters from the show via augmented reality.

Agent P’s fate will be revealed in the suspense-filled finale of the two-part special “Where’s Perry,” which premieres Friday, August 24th on Disney Channel.