Season 1 ZDF , 1997 Season 7 ZDF , 2004 Season 8 ZDF , 2005 Season 9 ZDF , 2006 Season 10 ZDF , 2006 - 2009 Season 11 ZDF , 2007 - 2008 Season 12 ZDF , 2008 - 2009 Season 13 ZDF , 2009 - 2012 Season 14 ZDF , 2010 Season 17 ZDF , 2014 - 2015