All Available Season All Season Specials Jan, 0001 6 episodes 0.0 Season 1 Mar, 2006 13 episodes 7.5 Season 2 Sep, 2006 22 episodes 7.3 Season 3 Feb, 2008 10 episodes 8.3 Season 4 Sep, 2008 22 episodes 7.7 Season 5 Sep, 2009 21 episodes 8.3
