Phineas and Ferb

Season 4, Episode 19

Episode Title: Happy Birthday, Isabella

Air Date: 2013-07-12

Overview:

Phineas and the gang celebrate Isabella's birthday in a big way, but all she really wants is some quiet time with Phineas. Meanwhile, Doofenshmirtz has installed his Bugs Me-Inator onto an evil bug bus and is driving around Danville turning all the things that bug him literally into bugs.