Although still funny, I was slightly disappointed by the number of cutaway shots, Most of which seemed completely random. I got the impression that they had thought of several things they would like to try, then just stuck them randomly into an episode.
More annoying than that though, was the fact that where series 1-3 had 7 episodes per disc, this one had just 4. Just over HALF of the number of episodes in the previous series. Did some go missing somehwere ? Or was there simply less episoes in the series ? I don't know.