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Phineas and Ferb S03E39, Quietest Day EverS03E39

Phineas and Ferb · Season 3

Phineas and Ferb season 3 episode 39: Quietest Day Ever

Aired 30 March 201211 minRated TV-G

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Where to watch Phineas and Ferb Season 3 in Australia

Phineas and Ferb season 3 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 “Quietest Day Ever”

After Mom asks the kids to keep quiet while she prepares for her online knitting test, Phineas and Ferb create ninja outfits designed to hide the wearer from anyone who is not wearing them. Meanwhile, Candace becomes increasingly frustrated after she can’t find the boys and bust them. Across town, Dr. Doofenshmirtz invents the De-Handsome-Inator.

Episode summary: TMDB.

Before you watch

  • It is episode 39 of 62 of season 3, so watch episodes 1 to 38 first.
  • It runs about 11 minutes.
  • Directed by Jay Lender, written by Kaz, Antoine Guilbaud and Jim Bernstein.

Phineas and Ferb trailer

The official trailer for the series (no preview of this episode has been published).

Phineas and Ferb trailerPlay video: Phineas and Ferb trailer

Cast and crew of this episode

Director
Jay Lender
Writers
KazAntoine GuilbaudJim Bernstein
Guest stars
John O'Hurley as Roger Doofenshmirtz (voice)

Credits: TMDB.

More from Phineas and Ferb Season 3

S03E38Previous · S03E38Bully Bromance Break Up16 March 2012
Next · S03E40The Doonkelberry Imperative30 March 2012
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Every episode of Season 3Phineas 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.