Phineas and Ferb is an American animated musical-comedy television series created by Dan Povenmire and Jeff "Swampy" Marsh for Disney Channel and Disney XD. It aired on the networks for four seasons between 2007 and 2015 and is expected to return for two additional seasons. The series follows stepbrothers Phineas Flynn and Ferb Fletcher during summer vacation. Every day, the boys construct a grand project or embark on a spectacular adventure to make the most of their time on vacation. This annoys their controlling older sister, Candace, who frequently tries to expose their schemes to her and Phineas's mother. The series follows a standard plot system; running gags occur in every episode.