Season 1
20 episodes
October 5, 2004 - February 22, 2005
Season 2
21 episodes
March 1, 2005 - July 19, 2005
Season 3
22 episodes
July 26, 2005 - January 10, 2006
Season 4
28 episodes
January 17, 2006 - August 1, 2006
Season 5
18 episodes
August 8, 2006 - January 4, 2007
Season 6
22 episodes
January 10, 2007 - June 27, 2007
Season 7
20 episodes
July 4, 2007 - December 5, 2007
Season 8
16 episodes
December 12, 2007 - April 16, 2008
Season 9
22 episodes
April 23, 2008 - October 7, 2008
Season 10
16 episodes
October 14, 2008 - February 3, 2009
Season 11
7 episodes
February 10, 2009 - March 24, 2009
Season 12
17 episodes
March 31, 2009 - July 21, 2009
Season 13
36 episodes
July 28, 2009 - April 6, 2010
Season 14
51 episodes
April 13, 2010 - April 5, 2011
Season 15
26 episodes
April 12, 2011 - October 4, 2011
Season 16
24 episodes
October 11, 2011 - March 27, 2012
Season 17
26 episodes
October 10, 2022 - September 30, 2023
Season 18
TBA