Episode 10

Series in which eight young adventurers go to extremes to help the planet.

The Ocean eight attempt to become one of the youngest teams in the world to sail around Cape Horn, seen by many as the sailing equivalent of Mount Everest and notorious for its dangerous seas.

The twenty-hour passage proves immensely difficult with gale-force winds and fifty-foot waves, and many of the team fall victim to seasickness.

Before setting off for the Horn, there's one final environmental project for the team to carry out - culling beavers to help preserve the unique region - which causes argument and upset among the young adventurers.