Phineas and Ferb

Set during summer vacation, the series follows stepbrothers Phineas Flynn and his taciturn English stepbrother Ferb Fletcher as they embark on daily grandiose, impossible, and elaborate projects. Their older sister, Candace Flynn, constantly tries to bust them and reveal their creations to their mom, Linda, though she is invariably thwarted just in time. Simultaneously, the family's seemingly mindless pet platypus, Perry, leads a secret double life as a covert operative known as "Agent P." He battles the incompetent and delightfully eccentric evil scientist Dr. Heinz Doofenshmirtz, whose convoluted schemes usually involve some variation of a "-inator" device. Both storylines invariably collide at the end of each episode, erasing all physical evidence of the boys' project just as Candace attempts to show her mother.