All Available Season All Season Specials Sep, 2011 1 episodes 0.0 Season 1 Sep, 2009 23 episodes 7.0 Season 2 Sep, 2010 23 episodes 7.2 Season 3 Sep, 2011 22 episodes 7.2 Season 4 Sep, 2012 22 episodes 7.2 Season 5 Sep, 2013 22 episodes 7.4 Season 6 Sep, 2014 22 episodes 7.0 Season 7 Oct, 2015 22 episodes 7.1
