This is the first time I have watched this series and although the episodes can be a bit depressing they are absolutely great episodes, such a good series, they've really put thought into the episodes and not to mention that you can watch them in any order you want! I think now that I have watched this new series I have to go and watch the rest and I have no doubt in my mind that the older episodes will just be as good. I feel like whoever created this series just though about the series and the episodes with thought, not a lazy made series at all there are too many out there like that where they rubbish.