<P> On February 15, 2014, it was announced that production of the show had been completed and no new episodes had been ordered, and that the show would go on an indefinite hiatus . However, new episodes started airing on Disney XD in June 2014, and on Disney Channel in the summer of 2014 . </P> <P> On May 7, 2015, Disney officially announced that the series has wrapped up after four seasons, and the final hour - long episode titled "Phineas and Ferb: Last Day of Summer" would premiere on June 12, 2015 on Disney XD, simulcast on Disney Channel . A 73 - hour marathon of the show would begin on Disney XD on June 9, 2015 . The series officially ended on June 12, 2015 on Disney Channel and Disney XD . It was also announced that a stand - alone hour - long special titled "O.W.C.A. Files" would be released the following Fall . The special officially premiered on Disney XD on November 9, 2015 . </P> <P> The show follows the adventures of stepbrothers Phineas Flynn (Vincent Martella) and Ferb Fletcher (Thomas Sangster), who live in the fictional city of Danville, in a (never specified) Tri-State area, as they seek ways to occupy their time during their summer vacation . Often these adventures involve elaborate, life - sized and ostensibly dangerous construction projects . Phineas's older sister, Candace Flynn (Ashley Tisdale), has two obsessions: "busting" Phineas and Ferb's schemes and ideas, and winning the attention of a boy named Jeremy (Mitchel Musso). Meanwhile, the boys' pet platypus, Perry, acts as a secret agent for an all - animal government organization called the O.W.C.A. ("Organization Without a Cool Acronym"), fighting Dr. Heinz Doofenshmirtz . </P> <P> Much of the series' humor relies on running gags used in almost every episode, with slight variation . Most episodes follow a pattern: </P>

What is the tri state area in phineas and ferb