The boys find a time machine at a museum and travel back to the Jurassic Age; Perry is sad when Doofenshmirtz replaces him with a new nemesis, Peter the Panda, so he confides in a relationship talk-show host.
The boys locate their parents' favorite band, Love Handel, to perform a reunion concert in the backyard to make up for dad forgetting his wedding anniversary; Doofenshmirtz plans a birthday party for his daughter Vanessa.
The boys decide to spend the day doing absolutely nothing, but Candace doesn't believe them and ends up constructing something of her own; Doofenshmirtz invents an "ugly-inator" so he will be more handsome than everyone else.
The boys are sent to the country's toughest reform school after their mom catches them making a flying car. Once there, an investigative reporter (Geraldo Rivera) does a story on them, which prompts Candace to bust them out.