Season 1 PBS , 2003 Watch now Season 2 PBS , 2004 Watch now Season 3 PBS , 2005 Watch now Season 4 PBS , 2006 - 2010 Watch now Season 5 PBS , 2007 Watch now Season 6 PBS , 2008 Watch now Season 7 PBS , 2009 Watch now Season 8 PBS , 2011 Watch now Season 9 PBS , 2013 Watch now Season 10 PBS , 2015 Watch now Season 11 PBS , 2016 Watch now Season 12 PBS , 2019 Watch now
, 2006 - 2010
