<Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 8 (+ 1) </Td> <Td_colspan="1"> 22 September 2013 (2013 - 09 - 22) </Td> <Td> 10 November 2013 (2013 - 11 - 10) 25 December 2013 (special) </Td> <Td> 11.84 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 8 (+ 1) </Td> <Td_colspan="1"> 21 September 2014 (2014 - 09 - 21) </Td> <Td> 9 November 2014 (2014 - 11 - 09) 25 December 2014 (special) </Td> <Td> 10.40 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 8 (+ 1) </Td> <Td_colspan="1"> 20 September 2015 (2015 - 09 - 20) </Td> <Td> 8 November 2015 (2015 - 11 - 08) 25 December 2015 (special) </Td> <Td> 10.42 </Td> </Tr> <Table> Series 1 <Tr> <Th> No . overall </Th> <Th> No. in series </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> UK viewers (millions) </Th> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Episode One" </Td> <Td> Brian Percival </Td> <Td> Julian Fellowes </Td> <Td> 26 September 2010 (2010 - 09 - 26) </Td> <Td> 9.25 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Episode Two" </Td> <Td> Ben Bolt </Td> <Td> Julian Fellowes </Td> <Td> 3 October 2010 (2010 - 10 - 03) </Td> <Td> 9.97 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Episode Three" </Td> <Td> Ben Bolt </Td> <Td> Julian Fellowes </Td> <Td> 10 October 2010 (2010 - 10 - 10) </Td> <Td> 8.97 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Episode Four" </Td> <Td> Brian Kelly </Td> <Td> Julian Fellowes, Shelagh Stephenson </Td> <Td> 17 October 2010 (2010 - 10 - 17) </Td> <Td> 9.70 </Td> </Tr> <Tr> <Th> 5 </Th> <Td> 5 </Td> <Td> "Episode Five" </Td> <Td> Brian Kelly </Td> <Td> Julian Fellowes </Td> <Td> 24 October 2010 (2010 - 10 - 24) </Td> <Td> 9.40 </Td> </Tr> <Tr> <Th> 6 </Th> <Td> 6 </Td> <Td> "Episode Six" </Td> <Td> Brian Percival </Td> <Td> Julian Fellowes, Tina Pepler </Td> <Td> 31 October 2010 (2010 - 10 - 31) </Td> <Td> 9.84 </Td> </Tr> <Tr> <Th> 7 </Th> <Td> 7 </Td> <Td> "Episode Seven" </Td> <Td> Brian Percival </Td> <Td> Julian Fellowes </Td> <Td> 7 November 2010 (2010 - 11 - 07) </Td> <Td> 10.77 </Td> </Tr> </Table>

How many episodes in season 6 downton abbey