This episode's pitches include a portable drum kit that doesn't need drums. But will the innovative entrepreneurs be willing to dance to the Dragons' tune? And the Den is left a little deflated over a nervous pitch for an inflatable tanning tent.

The final episode of the series includes ice cream that claims to be healthier than an apple and headphones that don't cover your ears, and a former barrister gets a lesson in margins from Touker Suleyman.