<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="2"> Originally aired </Th> <Th colspan="3"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Rating </Th> <Th> Tied with </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 9 </Td> <Td colspan="1"> March 27 , 2005 ( 2005 - 03 - 27 ) </Td> <Td> May 22 , 2005 ( 2005 - 05 - 22 ) </Td> <Td> 8 </Td> <Td> 11.6 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 27 </Td> <Td colspan="1"> September 25 , 2005 ( 2005 - 09 - 25 ) </Td> <Td> May 15 , 2006 ( 2006 - 05 - 15 ) </Td> <Td> 5 </Td> <Td> 12.5 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 25 </Td> <Td colspan="1"> September 21 , 2006 ( 2006 - 09 - 21 ) </Td> <Td> May 17 , 2007 ( 2007 - 05 - 17 ) </Td> <Td> 7 </Td> <Td> 12.1 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 17 </Td> <Td colspan="1"> September 27 , 2007 ( 2007 - 09 - 27 ) </Td> <Td> May 22 , 2008 ( 2008 - 05 - 22 ) </Td> <Td> 9 </Td> <Td> 10.4 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 25 , 2008 ( 2008 - 09 - 25 ) </Td> <Td> May 14 , 2009 ( 2009 - 05 - 14 ) </Td> <Td> 10 </Td> <Td> 9.6 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 24 , 2009 ( 2009 - 09 - 24 ) </Td> <Td> May 20 , 2010 ( 2010 - 05 - 20 ) </Td> <Td> 11 </Td> <Td> 9.0 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 23 , 2010 ( 2010 - 09 - 23 ) </Td> <Td> May 19 , 2011 ( 2011 - 05 - 19 ) </Td> <Td> 17 </Td> <Td> 7.5 </Td> <Td> The Voice Hawaii Five - 0 Desperate Housewives </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2011 ( 2011 - 09 - 22 ) </Td> <Td> May 17 , 2012 ( 2012 - 05 - 17 ) </Td> <Td> 21 </Td> <Td> 7.6 </Td> <Td> Hawaii Five - 0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 27 , 2012 ( 2012 - 09 - 27 ) </Td> <Td> May 16 , 2013 ( 2013 - 05 - 16 ) </Td> <Td> 18 </Td> <Td> 7.7 </Td> <Td> CSI : Crime Scene Investigation The Mentalist Modern Family Vegas </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 10 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 26 , 2013 ( 2013 - 09 - 26 ) </Td> <Td> May 15 , 2014 ( 2014 - 05 - 15 ) </Td> <Td> 11 </Td> <Td> 8.5 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 11 </Td> <Td colspan="2"> 25 </Td> <Td colspan="1"> September 25 , 2014 ( 2014 - 09 - 25 ) </Td> <Td> May 14 , 2015 ( 2015 - 05 - 14 ) </Td> <Td> 17 </Td> <Td> 7.8 </Td> <Td> 60 Minutes Hawaii Five - 0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 12 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 24 , 2015 ( 2015 - 09 - 24 ) </Td> <Td> May 19 , 2016 ( 2016 - 05 - 19 ) </Td> <Td> 11 </Td> <Td> 7.9 </Td> <Td> The Voice : Tuesday </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 13 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2016 ( 2016 - 09 - 22 ) </Td> <Td> May 18 , 2017 ( 2017 - 05 - 18 ) </Td> <Td> 16 </Td> <Td> 7.3 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 14 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 28 , 2017 ( 2017 - 09 - 28 ) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="2"> Originally aired </Th> <Th colspan="3"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Rating </Th> <Th> Tied with </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 9 </Td> <Td colspan="1"> March 27 , 2005 ( 2005 - 03 - 27 ) </Td> <Td> May 22 , 2005 ( 2005 - 05 - 22 ) </Td> <Td> 8 </Td> <Td> 11.6 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 27 </Td> <Td colspan="1"> September 25 , 2005 ( 2005 - 09 - 25 ) </Td> <Td> May 15 , 2006 ( 2006 - 05 - 15 ) </Td> <Td> 5 </Td> <Td> 12.5 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 25 </Td> <Td colspan="1"> September 21 , 2006 ( 2006 - 09 - 21 ) </Td> <Td> May 17 , 2007 ( 2007 - 05 - 17 ) </Td> <Td> 7 </Td> <Td> 12.1 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 17 </Td> <Td colspan="1"> September 27 , 2007 ( 2007 - 09 - 27 ) </Td> <Td> May 22 , 2008 ( 2008 - 05 - 22 ) </Td> <Td> 9 </Td> <Td> 10.4 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 25 , 2008 ( 2008 - 09 - 25 ) </Td> <Td> May 14 , 2009 ( 2009 - 05 - 14 ) </Td> <Td> 10 </Td> <Td> 9.6 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 24 , 2009 ( 2009 - 09 - 24 ) </Td> <Td> May 20 , 2010 ( 2010 - 05 - 20 ) </Td> <Td> 11 </Td> <Td> 9.0 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 23 , 2010 ( 2010 - 09 - 23 ) </Td> <Td> May 19 , 2011 ( 2011 - 05 - 19 ) </Td> <Td> 17 </Td> <Td> 7.5 </Td> <Td> The Voice Hawaii Five - 0 Desperate Housewives </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2011 ( 2011 - 09 - 22 ) </Td> <Td> May 17 , 2012 ( 2012 - 05 - 17 ) </Td> <Td> 21 </Td> <Td> 7.6 </Td> <Td> Hawaii Five - 0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 27 , 2012 ( 2012 - 09 - 27 ) </Td> <Td> May 16 , 2013 ( 2013 - 05 - 16 ) </Td> <Td> 18 </Td> <Td> 7.7 </Td> <Td> CSI : Crime Scene Investigation The Mentalist Modern Family Vegas </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 10 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 26 , 2013 ( 2013 - 09 - 26 ) </Td> <Td> May 15 , 2014 ( 2014 - 05 - 15 ) </Td> <Td> 11 </Td> <Td> 8.5 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 11 </Td> <Td colspan="2"> 25 </Td> <Td colspan="1"> September 25 , 2014 ( 2014 - 09 - 25 ) </Td> <Td> May 14 , 2015 ( 2015 - 05 - 14 ) </Td> <Td> 17 </Td> <Td> 7.8 </Td> <Td> 60 Minutes Hawaii Five - 0 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 12 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 24 , 2015 ( 2015 - 09 - 24 ) </Td> <Td> May 19 , 2016 ( 2016 - 05 - 19 ) </Td> <Td> 11 </Td> <Td> 7.9 </Td> <Td> The Voice : Tuesday </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 13 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2016 ( 2016 - 09 - 22 ) </Td> <Td> May 18 , 2017 ( 2017 - 05 - 18 ) </Td> <Td> 16 </Td> <Td> 7.3 </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 14 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 28 , 2017 ( 2017 - 09 - 28 ) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>
how many episodes of greys anatomy in season 4
how many episodes of greys anatomy in season 4
17
17