<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="3"> Originally aired </Th> <Th colspan="2"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Network </Th> <Th> Rank </Th> <Th> Average viewership ( in millions ) </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 23 , 2003 ( 2003 - 09 - 23 ) </Td> <Td> May 11 , 2004 ( 2004 - 05 - 11 ) </Td> <Td> The WB </Td> <Td> TBA </Td> <Td> 3.5 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 21 , 2004 ( 2004 - 09 - 21 ) </Td> <Td> May 24 , 2005 ( 2005 - 05 - 24 ) </Td> <Td> 117 </Td> <Td> 4.3 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 5 , 2005 ( 2005 - 10 - 05 ) </Td> <Td> May 3 , 2006 ( 2006 - 05 - 03 ) </Td> <Td> 139 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 21 </Td> <Td colspan="1"> September 27 , 2006 ( 2006 - 09 - 27 ) </Td> <Td> June 13 , 2007 ( 2007 - 06 - 13 ) </Td> <Td> The CW </Td> <Td> 136 </Td> <Td> 2.9 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 18 </Td> <Td colspan="1"> January 8 , 2008 ( 2008 - 01 - 08 ) </Td> <Td> May 19 , 2008 ( 2008 - 05 - 19 ) </Td> <Td> 184 </Td> <Td> 3.0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 1 , 2008 ( 2008 - 09 - 01 ) </Td> <Td> May 18 , 2009 ( 2009 - 05 - 18 ) </Td> <Td> 170 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 14 , 2009 ( 2009 - 09 - 14 ) </Td> <Td> May 17 , 2010 ( 2010 - 05 - 17 ) </Td> <Td> 130 </Td> <Td> 2.3 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 14 , 2010 ( 2010 - 09 - 14 ) </Td> <Td> May 17 , 2011 ( 2011 - 05 - 17 ) </Td> <Td> 138 </Td> <Td> 1.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 13 </Td> <Td colspan="1"> January 11 , 2012 ( 2012 - 01 - 11 ) </Td> <Td> April 4 , 2012 ( 2012 - 04 - 04 ) </Td> <Td> 180 </Td> <Td> 1.9 </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="3"> Originally aired </Th> <Th colspan="2"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Network </Th> <Th> Rank </Th> <Th> Average viewership ( in millions ) </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 23 , 2003 ( 2003 - 09 - 23 ) </Td> <Td> May 11 , 2004 ( 2004 - 05 - 11 ) </Td> <Td> The WB </Td> <Td> TBA </Td> <Td> 3.5 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 21 , 2004 ( 2004 - 09 - 21 ) </Td> <Td> May 24 , 2005 ( 2005 - 05 - 24 ) </Td> <Td> 117 </Td> <Td> 4.3 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 5 , 2005 ( 2005 - 10 - 05 ) </Td> <Td> May 3 , 2006 ( 2006 - 05 - 03 ) </Td> <Td> 139 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 21 </Td> <Td colspan="1"> September 27 , 2006 ( 2006 - 09 - 27 ) </Td> <Td> June 13 , 2007 ( 2007 - 06 - 13 ) </Td> <Td> The CW </Td> <Td> 136 </Td> <Td> 2.9 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 18 </Td> <Td colspan="1"> January 8 , 2008 ( 2008 - 01 - 08 ) </Td> <Td> May 19 , 2008 ( 2008 - 05 - 19 ) </Td> <Td> 184 </Td> <Td> 3.0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 1 , 2008 ( 2008 - 09 - 01 ) </Td> <Td> May 18 , 2009 ( 2009 - 05 - 18 ) </Td> <Td> 170 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 14 , 2009 ( 2009 - 09 - 14 ) </Td> <Td> May 17 , 2010 ( 2010 - 05 - 17 ) </Td> <Td> 130 </Td> <Td> 2.3 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 14 , 2010 ( 2010 - 09 - 14 ) </Td> <Td> May 17 , 2011 ( 2011 - 05 - 17 ) </Td> <Td> 138 </Td> <Td> 1.8 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 13 </Td> <Td colspan="1"> January 11 , 2012 ( 2012 - 01 - 11 ) </Td> <Td> April 4 , 2012 ( 2012 - 04 - 04 ) </Td> <Td> 180 </Td> <Td> 1.9 </Td> </Tr> </Table>
when was the last episode of one tree hill aired
when was the last episode of one tree hill aired
April 4 , 2012
April 4 , 2012