Season 1 Investigation Discovery , 2012 Watch now Season 2 Investigation Discovery , 2012 - 2013 Watch now Season 3 Investigation Discovery , 2013 Watch now Season 4 Investigation Discovery , 2013 Watch now Season 5 Investigation Discovery , 2014 Watch now Season 6 Investigation Discovery , 2016 Watch now Season 7 Investigation Discovery , 2017
, 2012
