After much deliberation, i decided to edit the review to make it clearer to some numpties. I like this series. However it isn't as good as the others. The jokes are not as fresh, and it has gone from being quirky, innovative and funny to the characters being more cliched (admittedly of themselves). In other words, the other two are better. I would suggest that if you rate this series as the best that you jumped on the bandwagon recently and don't really get it? Just a guess.
I seriously considered giving this 3 stars, but then realised that i was comparing it to the other two series, rather than a dvd on it's own. It isn't as good as the the other two series (probably about 2 stars worse...), but is still good, just not great. Still worth having a look at, just buy the others first.
I was disappointed to see the moon returning, because to be honest, i don't like him/it.