Season 4

The Fourth Season of Phineas and Ferb was officially announced on August 25, 2011. It had been renewed as part of a multi-year, multi-million dollar deal between creators Dan Povenmire, Jeff "Swampy" Marsh, and Disney. On November 9, 2011, it was announced that the fourth season will pick up with new episodes rolling out through 2014.

The season started with "For Your Ice Only", a winter-themed sports episode and "Happy New Year!", a celebration of New Years Day on December 7, 2012 on Disney Channel US and December 31, 2012 on Disney XD.

Other episodes include "Sidetracked" and "Primal Perry", a commemoration of Platypus Day, a musical featuring the one-hit wonder Phineas and the Ferb-Tones, an episode that succeeds the events of Phineas and Ferb The Movie: Across the 2nd Dimension and a crossover episode featuring the Marvel Universe.

Title sequence changes from Season 3
The title sequence remains the same, but images from Phineas and Ferb The Movie: Across the 2nd Dimension, "Doof Dynasty", "Moon Farm", "The Remains of the Platypus", "Escape from Phineas Tower", "Tri-Stone Area", "Excaliferb", and "Bully Bromance Breakup" replace the ones from Season 2.

Episodes
In the table below, the following abbreviations are used: DXD = Disney XD; DC US = Disney Channel US; Ep. # = Episode number; Vol. # = Volume number (shown in the iTunes Store as a "season").