User blog comment:FerbFlecher151/Season 4 - First Impressions/@comment-4417029-20121207105234

I like Season 3 too. besides, you know what aired during season 3:......Phineas and Ferb The Movie: Across the 2nd Dimension. It aired while Season 3 is still airing.

Also, what I look forward to Season 4 is the Marvel/Disney Crossover Phineas and Ferb: Mission Marvel

I got one, is it really the second 1-Hour Special?