User blog comment:Kenny S/What's episode after Escape From Phineas Tower?/@comment-74.103.48.45-20111015215206/@comment-3212462-20111015234115

That may not be (and most likely isn't) the last episode of the season. It's just the last one that's been confirmed so far. Obviously, they're not going to tell us the titles of every episode that will be in the third season right away. There will be more.

And Murphy is right; there will be a fourth season.