The Rough Scientists step up their search for gold. The deadline is looming for series host Kate Humble and the five Rough Scientists, who must find and extract enough gold to make a souvenir of their stay on New Zealand's south island. As the tension mounts, Kate sets three tough challenges: to extract gold from rock and sand, to build an altimeter, and to use the altimeter to find buried gold from a treasure map.

The treasure map

Kathy heads to the beach in her hunt for gold and Mike Bullivant and Mike Leahy extract gold from rock. Jonathan and Ellen create a portable altimeter to take with them on their expedition to search for gold.

"Rough Science" is the thinking person's reality show. The series takes a group of highly skilled scientists, drops them in a remote location and presents them with a series of challenges, all designed to test the practical side of their disciplines. In the engaging second season of the series, the tasks confronting the scientists revolve around a quest for gold in New Zealand and mastering space in the Arizona desert.

Note: This is part 5 of a series of 6 parts.