Earth's Wildest Waters: The Big Fish

Eight British anglers embark on a worldwide expedition, testing everything they know about fishing as they visit six countries in pursuit of extraordinary fish in the wildest places. Their first expedition is to the wilderness of Iceland, where the eight anglers brave extreme cold, wind and rain to fish in some of the most challenging conditions they have ever faced. Judge Matt Hayes is partnered with Vala, an Icelandic fishing expert who will help him judge the intrepid eight over their first three fishing tasks.

The seven anglers leave the freezing cold of Iceland for the tropical heat of Cuba - but violent storms make conditions tough. In the salt flats a couple of hours south of Havana they chase the ghostly bonefish, in the Bay of Pigs they must fish Cuban style - on simple tyre tube boats, and finally on the Atlantic Coast they're after giant tarpon, the `silver king'.

The six anglers travel to their most remote destination yet - the mighty Mekong River in Laos. Here people fish for survival, not for sport. The anglers must battle the blistering heat and the ferocious currents of the widest rapids in the world.

The five anglers head to Costa Rica to explore the Pacific Ocean and come face to face with some of the most incredible fish in the world.

The four remaining anglers gear up for a semi-final of epic proportions, fishing for some of the biggest fish of their lives in British Columbia. Here, the whole eco-system is driven by migrations of fish, so the anglers go on a journey of their own fishing for Pacific salmon in the sea near Vancouver Island.

The three finalists face their sixth country and their final frontier - Zambia. Navigating the immense Zambezi River, the anglers will be fishing alongside wild animals on land and in the murky water. They will be searching the croc infested waters for huge vundu catfish, fishing local style from wobbly dugout canoes and trying to catch Africa's equivalent to the piranha, the tiger fish.