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This challenge tests the teams' underwater ingenuity as they build a salvage machine from a stockpile of scrap in order to retrieve lost treasure from the bottom of a mini ocean.
On TV
First Shown
| Date | Time | Channel |
|---|---|---|
| Sunday 17 May 2009 | 12.10PM | More4 |
Last Shown
| Date | Time | Channel |
|---|---|---|
| Tuesday 01 September 2009 | 4AM | Channel 4 |
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