I'm enjoying the new Hitchhikers Guide to the Galaxy series currently playing on Radio4. The Tertiary Phase is 'based upon ideas by Douglas Adams', who also appears thanks to the wonders of digital technology. Most of the original cast appear with William Franklin striking the right note as the book replacing the late great Peter Jones. You can listen to the current week's episode again via the BBC Microsite which has a ton of other stuff including a nice video of how the third series was made. A fourth, presumably final, series is to be aired in May 2005.