Lost in Danville is an episode of Phineas and Ferb.
The episode starts with Phineas and Ferb under a tree in their backyard, and they are both talking about the mystery of toothpaste. Candace is listening to the newest Paisley Sideburn Brothers album. After Phineas says "How do they get the red and blue toothpaste to swirl?", a mysterious object falls from the sky. When Phineas and Ferb wonder why the capsule just won't open, Ferb says "And of course, 'where's Perry'"?
The next scene takes place in Perry's lair.