The latest journey begins on the Guadalquivir, Spain's second longest river. Cameras also focus on the great Muslim city of Cordoba, and there is a visit to the water gardens of the Alcazar, before travelling on to Seville. There the spotlight shines on a paralympic oarsman.

Cameras trek up to Canada's far northern reaches for a rough and tumble journey down one of the wildest rivers in the world, the Yukon. The unusual trip starts in an aircraft piloted by a painter, and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.