Tags: Television Season.
The third season of Phineas and Ferb first aired on Disney Channel on March 4 2011 and on Disney XD on March 5 2011. The season features two step-brothers on summer vacation trying to make every day the best day ever while their sister tries to bust them. The five main characters are: brothers Phineas Flynn and Ferb Fletcher secret agent Perry the Platypus (who’s also the pet of Phineas and Ferb) the evil scientist Dr.