Columns: Series number | Episode number | Date of first broadcast | Total viewers | Series average
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