Overview
Jayne Middlemiss, Colin Murray, Wendi Peters, Simon Shepherd, Janet Ellis, Deena Payne, Iwan Thomas, Rav Wilding, Pete Waterman, Stephen K. Amos, Gemma Bissix, Shirley Robertson, Ian Bleasdale, Paul Martin, Tracy-Ann Oberman, Brian Moore, Saira Khan, Rosie Boycott, Michael Obiora, Joel Ross, Shobna Gulati, Dennis Taylor, Siân Lloyd, Jan Leeming and Joe Swift. There was also a week of Comeback contestants featuring Joe McGann, Marie Helvin, Linda Barker, Claire Richards, Rowland Rivron, Ninia Benjamin, Steven Pinder, Wendi Peters, Helen Lederer, Tony Hadley, Martin Hancock and Jeff Green
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4 - 1Knockout rounds 1 & 2 June 10, 2009 -
4 - 2Knockout rounds 3 & 4 June 11, 2009
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4 - 3Quarterfinal one June 12, 2009
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4 - 4Knockout rounds 5 & 6 June 17, 2009
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4 - 5Knockout rounds 7 & 8 June 18, 2009
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4 - 6Quarterfinal two June 19, 2009
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4 - 7Knockout rounds 9 & 10 June 24, 2009
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4 - 8Knockout rounds 11 & 12 June 25, 2009
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4 - 9Quarterfinal three June 26, 2009
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4 - 10Quarterfinal four July 01, 2009
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4 - 11Semifinal day one July 02, 2009
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4 - 12Semifinal day two July 03, 2009
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4 - 13Final day one July 08, 2009
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4 - 14Final day two July 09, 2009
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4 - 15Series 4, Episode 15 July 10, 2009