"Phineas and Ferb" is an animated television series that follows two stepbrothers, Phineas Flynn and Ferb Fletcher, during their summer vacation. Each episode features the duo embarking on ambitious and creative projects, often involving elaborate inventions and adventures. Their older sister, Candace Flynn, frequently tries to expose their activities to their mom, but her efforts usually fail. The show also includes a subplot featuring Perry the Platypus, the boys' pet, who is secretly a spy working against the evil Dr. Heinz Doofenshmirtz. The series is known for its humor, catchy songs, and positive messages about creativity and teamwork.