In Zambia's remote Luangwa Valley there is one Nile crocodile so huge he reigns supreme as the undisputed king. Here, crocodiles thrive, and this ferocious, six-metre-long beast has his pick of the territory, the females and the food. However, this animal equivalent of the gangland boss is in for a rough ride when his turf is threatened by a younger, power-hungry up-and-comer.

Crocodile Ganglands follows this river monster's struggle for power and survival as he deals not only with this test of his authority, but also with the increasingly harsh surroundings as drought hits the region hard.

In this toughest of environments, few creatures and their offspring who dare to face the 'croc boss' escape with their lives. But, with a young contender looking to provide him with his biggest challenge yet, can the king croc hang on to his watery throne?