Season 1

The first season of Phineas and Ferb was composed of 44 episodes. It shows Phineas and Ferb during their summer vacation, trying to make it the best they can, as Candace tries to "bust" them for it and Perry the Platypus fights the evil Dr. Doofenshmirtz. The season premiere was "Rollercoaster" and the season finale was "Out to Launch".

Three additional episodes were produced during Season 1, but were only shown in a few countries outside of the United States during the Season 1 time period. For the U.S., they were held to become part of Season 2. Refer to the list of episodes below.

Episodes

 * The three episodes marked with were produced in Season 1 and aired in Latin America during Season 1. They were held until February 2009 for the launch of the new Disney XD channel that replaced Toon Disney and March 2009 for the season premiere on Disney Channel US. They are listed as Season 2 episodes. Refer to the Season 2 page for the air dates and air order for both channels.