Overview
Matt Baker and Julia Bradbury head for Hadrian's Wall in Northumberland to get a sneak preview of a spectacular plan to light all 73 miles of the iconic landmark as part of its 1,600th anniversary celebrations. Elsewhere, John Craven investigates why culling certain species of animals can help to conserve others and asks if the costs outweigh the benefits. James Wong looks at the future of food production and examines whether vertical farming - growing food on walls - could help feed our cities, while Adam Henson is hoping spring has finally sprung down on the farm when he scans his ewes to see how many lambs he can expect this season.
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23 - 1January 3, 2010 January 03, 2010 -
23 - 2January 10, 2010 January 10, 2010
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23 - 3January 17, 2010 January 17, 2010
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23 - 4January 24, 2010 January 24, 2010
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23 - 5January 31, 2010 January 31, 2010
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23 - 607/02/2010 February 07, 2010
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23 - 714/02/2010 February 14, 2010
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23 - 821/02/2010 February 21, 2010
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23 - 928/02/2010 February 28, 2010
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23 - 1007/03/2010 March 07, 2010
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23 - 1114/03/2010 March 14, 2010
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23 - 1221/03/2010 March 21, 2010
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23 - 1328/03/2010 March 28, 2010
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23 - 1404/04/2010 April 04, 2010
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23 - 1511/04/2010 April 11, 2010
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23 - 1618/04/2010 April 18, 2010
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23 - 1725/04/2010 April 25, 2010
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23 - 1802/05/2010 May 02, 2010
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23 - 19Spring Special May 03, 2010
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23 - 2009/05/2010 May 09, 2010
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23 - 2116/05/2010 May 16, 2010
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23 - 2223/05/2010 May 23, 2010
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23 - 2330/05/2010 May 30, 2010
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23 - 2404/06/2010 June 04, 2010
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23 - 2506/06/2010 June 06, 2010
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23 - 2613/06/2010 June 13, 2010
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23 - 2720/06/2010 June 20, 2010
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23 - 2827/06/2010 June 27, 2010
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23 - 2904/07/2010 July 04, 2010
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23 - 30Summer Special July 05, 2010
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23 - 3125/07/2010 July 25, 2010
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23 - 3201/08/2010 August 01, 2010
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23 - 3308/08/2010 August 08, 2010
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23 - 3415/08/2010 August 15, 2010
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23 - 3522/08/2010 August 22, 2010
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23 - 3629/08/2010 August 29, 2010
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23 - 3705/09/2010 September 05, 2010
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23 - 3812/09/2010 September 12, 2010
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23 - 3919/09/2010 September 19, 2010
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23 - 4026/09/2010 September 26, 2010
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23 - 4103/10/2010 October 03, 2010
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23 - 4210/10/2010 October 10, 2010
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23 - 4317/10/2010 October 17, 2010
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23 - 4424/10/2010 October 24, 2010
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23 - 45Autumn Special October 31, 2010
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23 - 4607/11/2010 November 07, 2010
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23 - 4714/11/2010 November 14, 2010
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23 - 4821/11/2010 November 21, 2010
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23 - 4928/11/2010 November 28, 2010
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23 - 5005/12/2010 December 05, 2010
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23 - 5112/12/2010 December 12, 2010
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23 - 5217/12/2010 December 17, 2010
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23 - 53Winter Special December 19, 2010
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23 - 5426/12/2010 December 26, 2010