It's full steam ahead from Bristol, the birthplace and now home of the SS Great Britain. Presenter Charlie Ross enjoys a journey of discovery above and below deck.

Things are just as shipshape over in Leominster where two teams are bargain hunting at an antiques centre, with their experts Kate Bliss and Tim Weeks. The reds, interior designers Kayla and Steve, have designs on a golden gavel. As for the blues, they are colleagues Nils and Lucas. Nils is Lucas's manager, but who will be the boss on their shop?

With the seconds ticking down, the teams are all at sea, so can auctioneer Andy Stowe bring this ship safely into port?

Christina Trevanion dons a hard hat and descends into a network of little-known tunnels underneath the ancient city of Exeter. By torchlight, she explores passageways six metres under the city streets that used to carry water pipes into the heart of Exeter.

Above ground, the teams delve into the antique stalls to unearth treasures to sell at auction in the nearby village of Hele. Digging for profits are the blues, sales assistants Jack and Shaun, with their expert Ben Cooper. Hoping to extinguish their plans are the reds, firefighters Andrew and Steve, guided by expert Richard Madley.

Shaun smells profits when they spot a cut-glass and silver scent bottle, while Steve isn't exactly bowled over by two homemade cricket bats. Can auctioneer Adam Partridge hit a six for the teams, or will they be out for a duck?