Table:
text: List of Last of the Summer Wine episodes
Series
Series
Series_Number Number_of_Episodes Original_Air_Date DVD_Region_2_release_date DVD_Region_1_release_date
1 6 1973 2 September 2002 TBA
2 7 1975 2 September 2002 TBA
3 7 1976 26 July 2004 11 March 2008
4 7 1977 26 July 2004 9 September 2008
5 7 1979 5 March 2007 6 September 2009
6 7 1982 5 March 2007 27 April 2010
7 6 1983 3 March 2008 27 April 2010
8 6 1985 3 March 2008 9 July 2010
9 12 1987 5 May 2008* 18 January 2011
10 6 1988 22 September 2008 12 April 2011
11 7 1989 22 September 2008 12 April 2011

Question: What was the original air date of series number 10 in List of Last of the Summer Wine episodes?