This is the first episode Rob and Tom shot and, in many ways, their favourite. The Howqua is their 'home' river: they learnt to fly fish there and know just about every bend. And the opportunity to stay in a genuine cattleman's hut made the hike truly worthwhile.

This episode begins at Bibury in the Cotswold Hills at a privately owned stream. Rob and Tom then head north by train to the tiny village of Altnaharra (pop. 35) in the far north of Scotland. Heather-covered hills, unspoilt lochs and some sensational single-malt whiskeys make this a very special trip. There were trout, sea trout and the possibility of a salmon, the most highly sought after fish in Great Britain.

A well-kept secret amongst fly fishing devotees are the numerous luxury lodges in New Zealand dedicated to visiting anglers. One such retreat is Rotoroa Lodge, in New Zealand's South Island. Here Rob and Tom are treated to gourmet food, luxurious accommodation and some of the finest wild brown trout river fishing in the world.

One of the most beautiful yet remote regions on the planet, the Kimberley is cut with magnificent rivers flowing through massive gorges. Each of these waterways is full of barramundi, a fish that must surely rate as one of the best tasting in the world.

A series of tiny coral islands off the coast of South america are home to the legendary bonefish, a bit, fast, beautiful fish that inhabits the clean white sand-flats of this tropical paradise. Rob and Tom discover this area is one of the last truly undiscovered gems on the travel map.