All Available Season All Season Season 1 Mar, 2010 13 episodes 9.0 Season 2 Sep, 2010 22 episodes 9.4 Season 3 Sep, 2011 18 episodes 8.4 Season 4 Sep, 2012 15 episodes 9.7 Season 5 Sep, 2013 22 episodes 9.5 Season 6 Sep, 2014 13 episodes 7.0
