Joe Lycett investigates the mind-boggling quantities of untreated sewage discharged into our waterways every day, and takes the fight to the water companies in the most Joe Lycett way possible.
A look back over the highs and lows experienced by the hundreds of entrepreneurs who have entered the Den over the last nine series, examining the key ingredients required for a successful pitch.
Series following the Dragons as they leave the Den to return to their business empires and multimillionaire lifestyles
The Dragons tour the UK to find out what happened next to their investments
Budding entrepreneurs get three minutes to pitch their business ideas to five multi-millionaires willing to invest their own cash.
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