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The Bikers begin their tour of industrial restoration projects by joining some ex-miners who are meticulously restoring Pleasley Colliery in Derbyshire. There is personal passion for Si as he helps to restore a steam winding engine, as his grandfather was a winder. Dave helps to celebrate 150 years of the London Underground by by putting Met 1, the tube's oldest working steam train, through its paces as it prepares to carry passengers a century after it went out of service. The Bikers also help fire up a barn engine on a Hampshire farm for the first time in 60 years and discover that the fairground was the last word in Victorian fun.

The Hairy Bikers continue their journey around Britain, meeting passionate, skilled heritage volunteers and taking part in the most exciting restoration projects of our industrial past. It is full steam ahead in Wiltshire as they help rebuild an early traction engine before seeing how they revolutionised farming, in Derbyshire they tackle a hundred-year-old cotton spinning mule that has laid dormant for decades and attempt to weave their own Hairy Biker cloth and in Cheshire they restore a rare barge once used to transport coal on Britain's canals.

Working on the massive job to reconstruct steam train 'The Night Owl', the Bikers forge a steel wheel taller than they are for the biggest locomotive restoration in Britain. Dave's first job was in a steelworks, and so was his dad's, so he's going back to his roots. The boys also help with the oldest steam engine still on-site in the world, sending Dave down into the cylinder to check out its condition after 60 years of neglect.