I've got series 1 on DVD and have seen 2 and 3 on the BBC, but is anything beyond that available on the net? Or the US Celebrity one which sounds interesting.

A while back I got one or two series 5 episodes on ITunes but I don't think they're available any more...

You need Utorrent (google it) and then you need to search for torrents (google it)

and download...good luck!!