Dragon's Den (UK): Season 21, Episode 4

21 - 4: Episode 4

More entrepreneurs sweat it out in the Den as they attempt to impress five of the smartest business minds in the country, Deborah Meaden, Peter Jones, Touker Suleyman, Sara Davies and Steven Bartlett.

The Dragons go back in time. Stone Age enthusiasts pitch their school workshops, a budding entrepreneur thinks he's spotted a gap in the market for natural ice pops, a Guinness World Record breaker wants to bring the ancient art of henna to the masses and two friends hope that diamonds are a Dragon's best friend as they seek a £250,000 investment for a share in their ethical jewellery line.