Peter Jones, Deborah Meaden, Touker Suleyman, Sarah Willingham and Nick Jenkins take their seats to face a fresh batch of entrepreneurs who dare to enter through the Den doors.In this episode, the Den's five multi-millionaire investors probe the money-making potential in wearable maps, interference-free guitar cables and an entrepreneur with a business selling manhole cover keys that has come back from the brink of bankruptcy. Will it be second time lucky for the plucky entrepreneur or will he see his investment hopes go down the drain?