I don't think series 4 was shown in australia
On one fansite it had the whole list of episodes
there are 52 in total with 4 series.
and I NEVER SAW SEREIES 4!
it had urpgor's neice in it!
so if you haven't seen that episode (and you're an aussie) then you may agree with me.
The last ep I saw was the one with the big plant given to mister blossom. In the last words Frizz said was that every cloud had a silver lining. because Nug said the plant may have eaten urpgor :)
either way that ep was the last one in season 3.
I'm VERY VERY VERY UPSET at missing those last episodes.
so I am VERY OVERJOYED to find out its coming out on dvd :)