what  series number where date first broadcast is 16 october 2008?
Series number Episode number Date of first broadcast Total viewers Series average
text real text real real
1-12995531-3
Series 1 1 27 September 2007 1997000 1242125
Series 1 2 4 October 2007 1475000 1242125
Series 1 3 11 October 2007 1098000 1242125
Series 1 4 18 October 2007 1108000 1242125
Series 1 5 25 October 2007 1077000 1242125
Series 1 6 1 November 2007 1003000 1242125
Series 1 7 8 November 2007 1194000 1242125
Series 1 8 15 November 2007 985000 1242125
Series 2 1 11 September 2008 1074000 975500
Series 2 2 11 September 2008 1044000 975500
Series 2 3 18 September 2008 1081000 975500
Series 2 4 25 September 2008 879000 975500
Series 2 5 2 October 2008 896000 975500
Series 2 6 9 October 2008 969000 975500
Series 2 7 16 October 2008 959000 975500
Series 2 8 23 October 2008 902000 975500
Series 3 1 28 January 2010 924000 837125
Series 3 2 28 January 2010 875000 837125
Series 3 3 4 February 2010 731000 837125
Series 3 4 11 February 2010 805000 837125
Series 3 5 18 February 2010 941000 837125
Series 3 6 25 February 2010 889000 837125
Series 3 7 4 March 2010 806000 837125
Series 3 8 11 March 2010 726000 837125
Series 4 1 1 February 2011 829000 649000
Series 4 2 8 February 2011 665000 649000
Series 4 3 15 February 2011 614000 649000
Series 4 4 22 February 2011 572000 649000
Series 4 5 1 March 2011 661000 649000
Series 4 6 8 March 2011 674000 649000
Series 4 7 15 March 2011 582000 649000
table_12995531_3
SELECT Series number FROM table WHERE Date of first broadcast = 16 October 2008
16 October 2008