Back to the Drawing BoardEpisode 3BBC Radio 4 Extra Duration: 15 minutesFirst broadcast: Wed 20th Feb 2008, 13:15 on BBC Radio 7Latest broadcast: Wed 10th Dec 2014, 21:45 on BBC Radio 4 ExtraWhat are the risks of debt, and when do you give up? Matthew Harvey looks at the characteristics of an inventor.GenresFactualScience & NatureFormatsDocumentariesSeriesBack to the Drawing Board Source: BBC Online