Overview: The Den doors are closing after another record-breaking series, and despite the recession the five multimillionaire investors have dug deep to pledge 1.75 million pounds to some of the UK's brightest businesses. In the final episode of the series, two friends hope the Dragons are in the party spirit as they tempt them with their frozen cocktails, a keen sailor demonstrates a nautical use for part of his car, and Peter Jones meets his namesake pitching a safety product for babies. Plus, a device to stop your tights falling down, an inflatable Christmas tree, and a beekeeper complete with a swarm of bees.