The best episode written by Scott D. Peterson is "Phineas and Ferb's Musical Cliptastic Countdown", rated 10/10 from 1 user votes. It was "directed by Dan Povenmire". "Phineas and Ferb's Musical Cliptastic Countdown" aired on 10/16/2009 and is rated 0.0 point(s) higher than their second highest rated, "Rollercoaster: The Musical!".
Perry the Platypus is reassigned and forced to move to the Quad State area with a new family and battle a new villain, the Regurgitator. During his new assignment, Phineas, Ferb, and Candace put in every effort to find him, hoping he'll return to them.
Director: Dan Povenmire
Writer: Scott D. Peterson
A musical in which Phineas and Ferb revisit the day they built a gigantic roller coaster in their backyard. Doofenshmirtz tries to pull the East Coast to the west using tinfoil and a huge magnet.
Director: Dan Povenmire
Writer: Scott D. Peterson
The boys decide to put on a traditional family Christmas special featuring their family, friends and a few very special guests, including Grammy winning recording artist Kelly Clarkson (playing herself). The episode features three new holiday songs - Isabella's "Let it Snow", a Buford and Baljeet rendition of "Good King Wenscelas" and the whole gang singing "We Wish You a Merry Christmas".
Director: Dan Povenmire
Writer: Scott D. Peterson
A man arrives in town that claims to be Kuzco's father. Kuzco, who does not remember his father, immediately thinks he is telling the truth and the two becomes inseparable. However, everyone else is suspicious of the man, and it turns out that he might not be who he says he is.
Director: Howy Parkins
Writer: Scott D. Peterson
Milo, Zack, and Melissa—with help from Phineas, Ferb, Candace, Buford, and Baljeet—help conquer Murphy's law to stop a swarm of Pistachions.
Director: Bob Bowen
Writer: Scott D. Peterson
In a similar vein as "Going the Extra Milo", Milo and Zack attempt to survive Murphy's Law while getting to school on a cold winter day while Bradley and Melissa bet on whether they'll make it on time again. Meanwhile, Cavendish and Dakota are forced to stand before the Time Council for their constant failures, resulting in their being fired and having their ability to time travel revoked.
Director: Robert Hughes
Writer: Scott D. Peterson