Second...possibly Third, I was too young the first time round. Granted I didn't care much for it when I first bought it on video, but it stands up well to repeated viewings.

I came to the show after the second series and so I did not like the first one as much, because it was, in essence, a different show with all the character roles reversed. The last series was good but it seemed very much like a ‘Best of’ compilation at times, with the ideas harking back to some of the themes that had been explored within the previous two series. The last episode I liked a lot and was upsetting at the time but now has dated badly, whilst I think my favourite episode is still the one with ‘the While Adders’

Watched it from the beginning when it was first aired. Absolutely loved all 4 series of it. Don't care if the last was a rehash of ideas or whatever, it made me laugh.