It's About Time! (Phineas and Ferb)

"It's About Time!"
Phineas and Ferb episode
Dr. Doofenshmirtz and Perry on the Dr. Feelbetter show. Several critics noted the somewhat homosexual subtext in their relationship portrayed in the episode.
Episode no.	Season 1 Episode 21
Directed by	Dan Povenmire
Written by	Dan Povenmire (story) Jon Colton Barry (storyboards) Mike Roth (storyboards) Kent Osborne (storyboards) Aliki Theofilopoulos Grafft (storyboards)
Featured music	When We Didn't Get Along My Nemesis
Production code	107
Original air date	March 1, 2008 (2008-03-01)
Episode chronology
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Phineas and Ferb (season 1)
List of episodes

"It's About Time!" is the 21st broadcast episode of the first season of the animated television series Phineas and Ferb. It originally aired on Disney Channel on March 1, 2008. The episode concerns stepbrothers Phineas and Ferb fixing a time machine on display in a museum and using it to travel back to prehistoric times. Meanwhile, Perry the Platypus deals with being replaced with a panda bear as the nemesis of the mad scientist Dr. Heinz Doofenshmirtz.

"It's About Time!" was written and directed by series co-creators Dan Povenmire, and storyboards were constructed by multiple artists in the show's production staff. The writers purposely left the time machine available to the boys at the end of the episode in order to reuse it later in the series, which they did in the season 2 episode "Phineas and Ferb's Quantum Boogaloo." Critical reception was generally positive, and multiple reviewers applauded Perry and Doofenshmirtz's relationship in the episode.