Phineas and Ferb (also known as Disney's Phineas and Ferb) is an American animated television series. Originally broadcast as a preview on August 17, 2007 on Disney Channel, the series follows two suburban stepbrothers on summer vacation. Each day the pair devise ambitious, involved plans and inventions to stave off boredom, often bringing them into conflict with their sister, Candace. The series follows a standard plot system: running gags occur every episode, and the B-Plot almost always features the boys' pet platypus, Perry, acting as a secret agent to fight an evil scientist named Heinz Doofenshmirtz. The two plots intersect at the end to erase all traces of the boys' project just before Candace can show it to their mother.