S04E39Phineas and Ferb season 4 episode 39: Operation Crumb Cake
Aired 14 July 201411 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 “Operation Crumb Cake”
Isabella unintentionally admits her feelings for Phineas in a letter. Meanwhile, Doof invents an inator to help change his misfortune
Episode summary: TMDB.
Before you watch
- It is episode 39 of 48 of season 4, so watch episodes 1 to 38 first.
- It runs about 11 minutes.
- Directed by Robert Hughes, written by Kim Roberson, Mike Bell 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 RobersonMike BellDani Vetere
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.