<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="2"> Originally aired </Th> <Th colspan="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Viewers ( millions ) </Th> <Th> Viewers rank </Th> <Th> 18 -- 49 rating / share </Th> <Th> 18 -- 49 rank </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 17 </Td> <Td colspan="1"> September 24 , 2007 ( 2007 - 09 - 24 ) </Td> <Td> May 19 , 2008 ( 2008 - 05 - 19 ) </Td> <Td> 8.31 </Td> <Td> 68 </Td> <Td> 3.3 / 8 </Td> <Td> 46 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 22 , 2008 ( 2008 - 09 - 22 ) </Td> <Td> May 11 , 2009 ( 2009 - 05 - 11 ) </Td> <Td> 10.03 </Td> <Td> 40 </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 21 , 2009 ( 2009 - 09 - 21 ) </Td> <Td> May 24 , 2010 ( 2010 - 05 - 24 ) </Td> <Td> 14.22 </Td> <Td> 12 </Td> <Td> 5.3 / 13 </Td> <Td> 5 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 23 , 2010 ( 2010 - 09 - 23 ) </Td> <Td> May 19 , 2011 ( 2011 - 05 - 19 ) </Td> <Td> 13.21 </Td> <Td> 13 </Td> <Td> 4.4 / 13 </Td> <Td> 7 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2011 ( 2011 - 09 - 22 ) </Td> <Td> May 10 , 2012 ( 2012 - 05 - 10 ) </Td> <Td> 15.82 </Td> <Td> 8 </Td> <Td> 5.5 / 17 </Td> <Td> 6 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </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> 18.68 </Td> <Td> </Td> <Td> 6.2 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </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> 19.96 </Td> <Td> </Td> <Td> 6.2 / 20 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2014 ( 2014 - 09 - 22 ) </Td> <Td> May 7 , 2015 ( 2015 - 05 - 07 ) </Td> <Td> 19.05 </Td> <Td> </Td> <Td> 5.6 / 17 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 21 , 2015 ( 2015 - 09 - 21 ) </Td> <Td> May 12 , 2016 ( 2016 - 05 - 12 ) </Td> <Td> 20.36 </Td> <Td> </Td> <Td> 5.8 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 10 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 19 , 2016 ( 2016 - 09 - 19 ) </Td> <Td> May 11 , 2017 ( 2017 - 05 - 11 ) </Td> <Td> 18.99 </Td> <Td> </Td> <Td> 4.9 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 11 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 25 , 2017 ( 2017 - 09 - 25 ) </Td> <Td> May 10 , 2018 ( 2018 - 05 - 10 ) </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="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Viewers ( millions ) </Th> <Th> Viewers rank </Th> <Th> 18 -- 49 rating / share </Th> <Th> 18 -- 49 rank </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 17 </Td> <Td colspan="1"> September 24 , 2007 ( 2007 - 09 - 24 ) </Td> <Td> May 19 , 2008 ( 2008 - 05 - 19 ) </Td> <Td> 8.31 </Td> <Td> 68 </Td> <Td> 3.3 / 8 </Td> <Td> 46 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 22 , 2008 ( 2008 - 09 - 22 ) </Td> <Td> May 11 , 2009 ( 2009 - 05 - 11 ) </Td> <Td> 10.03 </Td> <Td> 40 </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 21 , 2009 ( 2009 - 09 - 21 ) </Td> <Td> May 24 , 2010 ( 2010 - 05 - 24 ) </Td> <Td> 14.22 </Td> <Td> 12 </Td> <Td> 5.3 / 13 </Td> <Td> 5 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 23 , 2010 ( 2010 - 09 - 23 ) </Td> <Td> May 19 , 2011 ( 2011 - 05 - 19 ) </Td> <Td> 13.21 </Td> <Td> 13 </Td> <Td> 4.4 / 13 </Td> <Td> 7 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2011 ( 2011 - 09 - 22 ) </Td> <Td> May 10 , 2012 ( 2012 - 05 - 10 ) </Td> <Td> 15.82 </Td> <Td> 8 </Td> <Td> 5.5 / 17 </Td> <Td> 6 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </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> 18.68 </Td> <Td> </Td> <Td> 6.2 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </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> 19.96 </Td> <Td> </Td> <Td> 6.2 / 20 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 8 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 22 , 2014 ( 2014 - 09 - 22 ) </Td> <Td> May 7 , 2015 ( 2015 - 05 - 07 ) </Td> <Td> 19.05 </Td> <Td> </Td> <Td> 5.6 / 17 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 9 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 21 , 2015 ( 2015 - 09 - 21 ) </Td> <Td> May 12 , 2016 ( 2016 - 05 - 12 ) </Td> <Td> 20.36 </Td> <Td> </Td> <Td> 5.8 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 10 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 19 , 2016 ( 2016 - 09 - 19 ) </Td> <Td> May 11 , 2017 ( 2017 - 05 - 11 ) </Td> <Td> 18.99 </Td> <Td> </Td> <Td> 4.9 / 19 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 11 </Td> <Td colspan="2"> 24 </Td> <Td colspan="1"> September 25 , 2017 ( 2017 - 09 - 25 ) </Td> <Td> May 10 , 2018 ( 2018 - 05 - 10 ) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>
when does the big bang theory season end
when does the big bang theory season end
May 10 , 2018
May 10 , 2018