S04E47Phineas and Ferb season 4 episode 47: Act Your Age
Aired 9 February 201524 minRated TV-G
Where to watch Phineas and Ferb Season 4 in Australia
Phineas and Ferb season 4 is streaming in Australia on Disney+ (subscription, listed for the whole show). You can also buy it on Apple TV from $14.99.
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Availability checked 16 November 2026.
What happens in “Act Your Age”
It's been 10 years after the events of the present, 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.
Episode summary: TMDB.
Before you watch
- It is episode 47 of 48 of season 4, so watch episodes 1 to 46 first.
- It runs about 24 minutes.
- Directed by Robert Hughes, written by Kim Roberson, Bernie Petterson and Dani Vetere.
Phineas and Ferb trailer
The official trailer for the series (no preview of this episode has been published).
Play video: Phineas and Ferb trailer
Cast and crew of this episode
- Director
- Robert Hughes
- Writers
- Kim RobersonBernie PettersonDani Vetere
- Guest stars
- Jack McBrayer as Irving (voice)Carol Kane as Nana Shapiro (voice)
Credits: TMDB.
More from Phineas and Ferb Season 4
Every episode of Season 4Phineas and Ferb episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.