When had been series premiere pilot episode
Series Episodes Series premiere Series finale Region 1 Region 2 Region 4
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1-15823956-1
Pilot 1 18 February 2008 18 February 2008 N/A N/A N/A
1 6 25 January 2009 1 March 2009 20 July 2010 20 April 2009 6 August 2009
2 8 10 January 2010 28 February 2010 21 September 2010 12 April 2010 5 August 2010
3 8 23 January 2011 13 March 2011 3 May 2011 28 March 2011 5 May 2011
4 8 5 February 2012 25 March 2012 15 January 2013 23 April 2012 7 June 2012
table_15823956_1
SELECT Series premiere FROM table WHERE Series = Pilot
Pilot