On tonight's programme, a Birmingham-based nurse with a love for hats demonstrates her toilet product; a product designer, who's travelled all the way from Singapore, pitches his new tablet computer; and a husband-and-wife team from Bradford try to convince the Dragons that their caravan covers are really something to get excited about.Also in the episode: a Halifax mother of two with her oven cleaner, an invention from an airline pilot that can tow children, and a four-year-old boy pitches for a seventy-five-thousand-pound investment and a bag of sweets.