Six Americans hunting for diamonds in South Africa find that the trade is a brutal business full of shark-infested waters.

Marty has a near-death experience when his oxygen tank explodes; Mart, Sam and Jason get into a brawl.

A knife fight and a shocking mutiny leave the crew's future in question. Also: The captain clashes with the mining boss.

A diver encounters a big shark; poachers board the boat at night.

A wilderness trek transpires at night, and a deadly storm hits the Skeleton Coast.