The series revealing the lives of the Dragons' Den dragons (and how they made their money) continues tonight with a look at the most stoic Dragon of all - Deborah Meaden. Having made her fortune in the leisure industry, Deborah's back at Butlins, the home of her first venture into entrepreneurialism: a bingo concession. We find out from her husband Paul what he thinks of being married to a dragon; discover what it's like being the only female dragon in an otherwise testosterone-fuelled den; and hear from a former employee about how tough she was to work for. The answer? Very. We also catch up with some of Deborah's Den investments and discover how the businesses are developing with a dragon on board. One of Deborah's most memorable investments, Sarah Lu and her You Doo Doll, has developed into a full range of products including a You Doo Dog.