What Rob said is revealed in the first 5 minutes of season 2. Not to mention the fact that the subject matter of season 2 was widely publicized months before the broadcasts started. To answer some of Martin's other questions: Audio on the DVD set is 2.0; video is widescreen, 16:9 enhanced...
Let me explain why I suggested the official site.
Over the years, I've seen many people ask whether they should buy this or that disc, sight unseen. In an almost predictable response, fans of the title jump in and say, "Buy it! It's great."
I've also seen many threads that begin like this...