Wild and unnavigable, Africa's Zambezi boasts the world's mightiest waterfall, heart-pounding rapids and man-eating crocs. From the upper reaches in Zambia to the delta in Mozambique, Jeremy investigates the threats to this mighty river.
The Amazon is the mightiest of all the rivers, but it is also under immense pressure. Jeremy Wade traces the epic migration of the dorado catfish and discovers the issues putting this great river at risk from leaking pipelines to impassable dams.
The Mighty Mississippi is threatened on several fronts - from alien invaders pushing out iconic native fish, to vast blooms of green algae strangling life from the river. Jeremy Wade meets scientists, fishermen and leaders fighting to save the river.