Season 1 Discovery , 2008 Watch now Season 2 Discovery , 2009 Watch now Season 3 Discovery , 2010 Watch now Season 4 Discovery , 2011 Watch now Season 5 Discovery , 2011 Watch now Season 6 Discovery , 2012 Watch now Season 7 Discovery , 2013 Watch now Season 8 Discovery , 2015 Watch now Season 9 Discovery , 2016 Watch now Season 10 Discovery , 2017 - 2018 Watch now