Season 1 Seven Network , 2004 Watch now Season 2 Seven Network , 2005 Watch now Season 3 Seven Network , 2006 Watch now Season 4 Seven Network , 2006 - 2007 Watch now Season 5 Seven Network , 2007 Watch now Season 6 Seven Network , 2008 Watch now Season 7 Seven Network , 2009 Watch now Season 8 Seven Network , 2009 Watch now Season 9 Seven Network , 2010 Watch now Season 10 Seven Network , 2010 Watch now Season 11 Seven Network , 2001 - 2011 Watch now Season 12 Seven Network , 2012 Watch now Season 13 Seven Network , 2013 Watch now Season 14 Seven Network , 2014 Watch now Season 15 Seven Network , 2015 Watch now Season 16 Seven Network , 2016 Watch now Season 17 Seven Network , 2017 Watch now Season 18 Seven Network , 2018 Watch now Season 19 Seven Network , 2018 - 2020 Season 20 Seven Network , 2021 Season 21 Seven Network , 2021 - 2023 Season 22 Seven Network , 2023