<P> The following is a list of episodes, listed in order of their original UK air date along with featured cars, challenges, and guests . For more information on features and challenges included in each series, visit each series' respective page . Comprehensive lists of challenges and races can be found at Top Gear challenges and Top Gear Races . The list does not include the following episodes: two shorter episodes produced for charity - Top Gear of the Pops, produced for Red Nose Day, and Top Ground Gear Force, produced for Sport Relief; and an Ashes to Ashes parody for BBC Children in Need . </P> <P> As of 1 April 2018, 197 episodes of Top Gear have aired . </P> <Table> <Tr> <Th_colspan="2"> Series </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Average UK viewers (in millions) </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 20 October 2002 (2002 - 10 - 20) </Td> <Td> 29 December 2002 (2002 - 12 - 29) </Td> <Td> 3.30 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 11 May 2003 (2003 - 05 - 11) </Td> <Td> 20 July 2003 (2003 - 07 - 20) </Td> <Td> 3.16 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 9 </Td> <Td_colspan="1"> 26 October 2003 (2003 - 10 - 26) </Td> <Td> 28 December 2003 (2003 - 12 - 28) </Td> <Td> 4.03 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 9 May 2004 (2004 - 05 - 09) </Td> <Td> 1 August 2004 (2004 - 08 - 01) </Td> <Td> 3.48 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 9 </Td> <Td_colspan="1"> 24 October 2004 (2004 - 10 - 24) </Td> <Td> 26 December 2004 (2004 - 12 - 26) </Td> <Td> 4.15 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 11 </Td> <Td_colspan="1"> 22 May 2005 (2005 - 05 - 22) </Td> <Td> 7 August 2005 (2005 - 08 - 07) </Td> <Td> 4.21 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 13 November 2005 (2005 - 11 - 13) </Td> <Td> 12 February 2006 (2006 - 02 - 12) </Td> <Td> 4.61 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 8 </Td> <Td_colspan="2"> 8 </Td> <Td_colspan="1"> 7 May 2006 (2006 - 05 - 07) </Td> <Td> 30 July 2006 (2006 - 07 - 30) </Td> <Td> 4.45 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 9 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 28 January 2007 (2007 - 01 - 28) </Td> <Td> 4 March 2007 (2007 - 03 - 04) </Td> <Td> 7.45 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 10 </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 7 October 2007 (2007 - 10 - 07) </Td> <Td> 23 December 2007 (2007 - 12 - 23) </Td> <Td> 7.01 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 11 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 22 June 2008 (2008 - 06 - 22) </Td> <Td> 27 July 2008 (2008 - 07 - 27) </Td> <Td> 5.94 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 12 </Td> <Td_colspan="2"> 8 </Td> <Td_colspan="1"> 2 November 2008 (2008 - 11 - 02) </Td> <Td> 28 December 2008 (2008 - 12 - 28) </Td> <Td> 7.32 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 13 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 21 June 2009 (2009 - 06 - 21) </Td> <Td> 2 August 2009 (2009 - 08 - 02) </Td> <Td> 7.17 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 14 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 15 November 2009 (2009 - 11 - 15) </Td> <Td> 3 January 2010 (2010 - 01 - 03) </Td> <Td> 6.69 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 15 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 27 June 2010 (2010 - 06 - 27) </Td> <Td> 1 August 2010 (2010 - 08 - 01) </Td> <Td> 6.25 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 16 </Td> <Td_colspan="2"> 8 </Td> <Td_colspan="1"> 21 December 2010 (2010 - 12 - 21) </Td> <Td> 27 February 2011 (2011 - 02 - 27) </Td> <Td> 7.19 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 17 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 26 June 2011 (2011 - 06 - 26) </Td> <Td> 31 July 2011 (2011 - 07 - 31) </Td> <Td> 6.42 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 18 </Td> <Td_colspan="2"> 8 </Td> <Td_colspan="1"> 28 December 2011 (2011 - 12 - 28) </Td> <Td> 11 March 2012 (2012 - 03 - 11) </Td> <Td> 6.07 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 19 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 27 January 2013 (2013 - 01 - 27) </Td> <Td> 10 March 2013 (2013 - 03 - 10) </Td> <Td> 6.58 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 20 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 30 June 2013 (2013 - 06 - 30) </Td> <Td> 4 August 2013 (2013 - 08 - 04) </Td> <Td> 5.31 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 21 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 2 February 2014 (2014 - 02 - 02) </Td> <Td> 16 March 2014 (2014 - 03 - 16) </Td> <Td> 6.49 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 22 </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 27 December 2014 (2014 - 12 - 27) </Td> <Td> 28 June 2015 (2015 - 06 - 28) </Td> <Td> 6.49 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> Specials </Td> <Td_colspan="2"> </Td> <Td_colspan="1"> 26 December 2015 (2015 - 12 - 26) </Td> <Td> 30 December 2015 (2015 - 12 - 30) </Td> <Td> 1.79 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 23 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 29 May 2016 (2016 - 05 - 29) </Td> <Td> 3 July 2016 (2016 - 07 - 03) </Td> <Td> 3.89 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 24 </Td> <Td_colspan="2"> 7 </Td> <Td_colspan="1"> 5 March 2017 (2017 - 03 - 05) </Td> <Td> 23 April 2017 (2017 - 04 - 23) </Td> <Td> 3.15 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 25 </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> 25 February 2018 (2018 - 02 - 25) </Td> <Td> 1 April 2018 (2018 - 04 - 01) </Td> <Td> 3.11 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Series </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Average UK viewers (in millions) </Th> </Tr>

How many seasons does top gear uk have