Evan Davis presents as five multi-millionaire investors, who have all built up their own fortunes from scratch, are ready to back the best business ideas and inventions with their own money. As another batch of dry-mouthed entrepreneurs await their opportunity to pitch in The Den, will anyone persuade them to invest?The ideas pitched in this programme range from a Rotamate clothes dryer that protects washing from the rain (and the birds!), to replica phone boxes. There are also theatre schools, a replacement for the traditional door bolt, water-powered batteries, pet burial kits, an emergency fire ladder and a new way of teaching tennis.