Act Your Age

It's been 10 years after the events of Summer, and Phineas must decide what University to go to. After discovering that Isabella had a crush on him for years, Phineas must reach her before she leaves for college and express his true feelings for her. Meanwhile, Doofenshmirtz has a mid-life crisis.

Songs

 * Unnamed Phineas/Isabella Song
 * Danville for Niceness (instrumental)

Background Information

 * This episode takes place 10 years after the events of the series.
 * This is a Valentine's Day special.

Production Information

 * On November 15, 2012, Robert F. Hughes posted a tweet in which he said that Madison Scheckel had come to write with them a Phineas/Isabella song.
 * On December 14, 2012, Dan Povenmire tweeted the photo of Vincent Martella singing the aforementioned song.
 * On March 1, 2013, Dan Povenmire, Jeff "Swampy" Marsh and Jake Whetter had a Spreecast chat. Fans were welcome to send in questions using Spreecast, Facebook, or Twitter with the hashtag "#PlatypusDay". During Spreecast, Dan and Swampy had confirmed an emotional Phineas/Isabella episode in Season 4, and mentioned that the song made them both cry.
 * On May 10, 2013, Robert F. Hughes mentioned via Twitter that this episode is not the Season 4 finale and its name is "Act Your Age".
 * On May 18, 2013, Bernie Petterson has confirmed that he and Kim Roberson are the writers and storyboard artists for this episode.
 * On August 28, 2013, Robert F. Hughes confirmed that this episode will be a 22-minute long episode (30 minutes with commercials).
 * On December 16, 2013, Aliki Theofilopoulos Grafft confirmed that this episode's animation is already done at least for a week from that moment.
 * On January 14, 2014, Dan and Swampy posted a tweet from their recording session for the episode with Alyson Stoner.
 * On January 22, 2014, Dan post two script doodles of "Act Your Age".
 * During their July 22nd, 2014 Spreecast to promote "Phineas and Ferb: Star Wars", Dan Povenmire noted that this episode would air in February 2015.
 * A few scenes of this episode were shown at the 2014 SDCC.
 * The teenage versions of Phineas and the gang were drawn by DeviantArt user Ashley "KicsterAsh" Simpson. Dan Povenmire created a DeviantArt account for himself just so he could ask her to design for this episode.
 * Of the teenage Fireside Girls, only Gretchen and Adyson have the same voice actresses as their teenage counterparts. The voice of Ginger is provided by Ming-Na, the real life mother of Michaela Zee, the current voice of Ginger, who also voices Dr. Hirano.
 * Rumors circulated among the public that this episode is the series finale. Because of this, numerous crew members have made public announcements to deny it.

International Premieres

 * May 10, 2014 (Disney Channel New Zealand)
 * August 12, 2014 (Disney Channel Russia)

Trivia

 * Second episode to take place in the future. ("Phineas and Ferb's Quantum Boogaloo")

Cast

 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Caroline Rhea as Mom
 * Richard O'Brien as Dad
 * Dan Povenmire as Dr. Doofenshmirtz, Himself, Additional Voices
 * Jeff "Swampy" Marsh as Major Monogram, Himself
 * Tyler Mann as Commander Carl
 * Maulik Pancholy as Baljeet
 * Bobby Gaylor as Buford
 * Alyson Stoner as Isabella
 * Olivia Olson as Vanessa
 * Jack McBrayer as Irving
 * Eileen Galindo as Mrs. Garcia-Shapiro
 * Carol Kane as Nana Shapiro
 * Ariel Winter as Teen Gretchen
 * Madison Pettis as Teen Adyson
 * Dana Davis as Teen Holly
 * Ming-Na Wen as Teen Ginger
 * Dannah Phirman as Teen Milly (misspelled and credited as "Millie")
 * Soleil McGhee as Teen Katie
 * Additional Voices: Mackenzie Phillips, Diedrich Bader