Deep Sea Treasure
The second semi-final of the 10th series of Scrapheap Challenge tests the teams' underwater ingenuity. They must build a salvage machine from a pile of scrap that can retrieve lost treasure from the bottom of a mini ocean.
An urn, a cannon barrel and a ship's wheel lie six metres below the surface. Can the two groups of backyard bodgers construct a contraption to rescue the items and bring them back to dry land?
Trying to crack this week's engineering enigmas are Bristol-based model-makers the Supermodels and Berkshire military vehicle enthusiasts the Rusty Regiment.
Which team will surface with a place in the final and who will sink without trace?
