Season 1 History , 2008 Watch now Season 2 History , 2009 Watch now Season 3 History , 2010 Watch now Season 4 History , 2010 - 2011 Watch now Season 5 History , 2012 Watch now Season 6 History , 2012 - 2013 Watch now Season 7 History , 2013 - 2014 Watch now Season 8 History , 2014 - 2015 Watch now Season 9 History , 2015 - 2016 Watch now Season 10 History , 2019 Watch now