Sister From the Same Planet

A year has passed since Linda Flynn-Fletcher died, Phineas, fed up with Candace's horrible attempts to be a mother, joins the Big Sister program posing as an abandoned child so he can hang out with a better mother figure. Candace & Isabella find out about Phineas' cool, attractive new girlfriend, Amy, and Candace exacts her revenge by donating her time as a big sister to a real orphan named Gus, who also happens to have a crush on Isabella.

Songs

 * Why Did Phineas Leave Me?

Cast
Phineas Flynn

Ferb Fletcher

Candace Flynn

Isabella Garcia-Shapiro

More to be announced