It was last broadcast in September, on Discovery. It was also on HD VOD for a time. I don't see anything scheduled in the near future. If you have a Blu-Ray player it is available for purchase or rental. It is compelling video.
Yeah I got this on HD-DVD and I would say it is one on the best HD programs out there of its kind. It is really on do not miss. They do have re runs on it that play every now and again. But I would say jump on eBay and get it on HD-DVD or Blu-Ray of you have the players.