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A look at the highs and lows experienced by the many entrepreneurs who have entered the Den, examining the ingredients required for a successful pitch.

The Dragons share their expertise on the art of negotiation. Plus a look back at which Den entrepreneur delivered the masterclass in negotiation.

The Dragons share their thoughts about how the strength of an idea is the key to unlocking cash in the Den. With a look at eccentric inventor Mark Champkins, from 2007.

The Dragons revisit some of the businesses they have invested in, including a caravan sleeping bag, and share expertise on creating a successful business plan.