Some people are drawn towards nature at its most extreme - and it doesn't get more extreme than giant waves.

These deadly waves have a strangely hypnotic pull on two types of person: for scientists and super-surfers, rogue waves are a grail, and they will go to dangerous lengths to hunt them down.

This is a white-knuckle ride with the men who live to catch rogue waves. It zips from Lloyds of London to rusty oil rigs, tropical Tahitian surf shacks to super-computer data labs. Find out what happens when nature confronts nature at her most ferocious.