Everyone else pretty much said all that I wanted to say, but when watching the premiere, I was reminded about why I loved Foster's so much: the characters, the humor, and--especially in this case--the heart.
I also loved the fact that something GOOD happened to Frankie, and the antagonist is, IMO, one of the greatest (and cutest
) in cartoon history! I just hope this makes the CN guys consider re-airing the show as it reaches its end.
One thing I'm curious about, as someone mentioned, is the backstory behind World's creator and his family.
I want to know what happened that caused him to be locked up in the first place.