Season 1
13 episodes · 2004
Season 2
12 episodes · 2005
Season 3
12 episodes · 2007
Season 4
12 episodes · 2007
Season 5
12 episodes · 2008
Season 6
16 episodes · 2009
Season 7
24 episodes · 2010
Season 8
24 episodes · 2011
Season 9
40 episodes · 2017