The Dragons tour the UK to find out what happened next. They drop in on the father and son team behind Ladderbox, pop sculptor Guy Portelli and olive oil enthusiast Michael North.

Duncan Bannatyne heads to London to visit Shaun Pulfrey and his Tangle Teezer brush, and Peter Jones gets physical with the products of Jason Robert's Tech21.

Peter Jones visits Eddie Middleton with his eco-friendly patio heaters, and Duncan Bannatyne goes window cleaning with his new investment UK Commercial Cleaning.

The Dragons catch up with the band Hamfatter to find out how the Den's first rock investment is doing. Duncan drops in on Sharon Wright, one of the stars of the 2009 series.

The final stage of the Dragons' tour is the West. James Caan visits Clive Billing, the man who caused astonishment in the Den by spurning an offer from three Dragons.