Season 1 BBC Two , 2003 Season 2 BBC Two , 2004 Season 3 BBC Two , 2005 Season 4 BBC Two , 2005 Season 5 BBC Two , 2006 Season 6 BBC Two , 2007 Season 8 BBC Two , 2008 Season 10 BBC Two , 2009 Season 11 BBC Two , 2010 Season 12 BBC Two , 2011 Season 13 BBC Two , 2012 Season 14 BBC Two , 2013 Season 15 BBC Two , 2014 Season 16 BBC Two , 2015 - 2016 Season 17 BBC Two , 2016 Season 18 BBC Two , 2016 - 2017 Season 19 BBC Two , 2017 - 2018 Season 20 BBC Two , 2018 - 2019 Season 21 BBC Two , 2019 - 2020
, 2003