I watched the X series of Red Dwarf today. There are only 6 episodes but there are over 3 hours of extras on a second disc. They aired in October and November 2012. That's 3 years from the Back To Earth series and the last regular series aired in 1999. Like those earlier series, this one was recorded in front of a live audience. Series co-creator Doug Naylor wrote and directed the episodes. There's no episode commentaries but Doug Naylor does a commentary on the 29 minutes of deleted scenes. The making of runs over 2 hours and there's plenty of interest. From the making of there seems to be a lot of issues with making the series but they got over them and produced a nice bunch of episodes.