I started watching the show from season 7 because of Richard Armitage. While waiting for season 8 come out in US DVD, I went back and watched season 1. Couldn't really finish an episode because it was really slow. Then I jumped to season 3 because of the new main character. Season 4 was good with all the extra back story, but this season 5 is off the chart. Loving all the characters, plus the new one Ros.