Tonight sees the penultimate episode of the current series, with more intrepid businessmen and women hoping to receive a cash injection from the five multimillionaires. The Dragons have already proven that they are willing to invest in the right idea - will they spot the next big thing tonight?Entrepreneurs include: two Berkshire design graduates who think they've solved the multiple-pint juggle when carrying a round back from the bar, a former celebrity PA who has an awkward moment when her mobile phone rings during her pitch, and an ex-DJ from south Wales who hopes his role-play disco will best demonstrate his product for sore feet.Also pitched are a website for 'amazing' retirees, a gadget to reduce our food waste, and a car that's also a barbeque.