Season 1 HBO , 2004 Watch now Season 2 HBO , 2005 Watch now Season 3 HBO , 2006 - 2007 Watch now Season 4 HBO , 2007 Watch now Season 5 HBO , 2008 Watch now Season 6 HBO , 2009 Watch now Season 7 HBO , 2010 Watch now Season 8 HBO , 2011 Watch now