Plot synopsis: Documentary series from the BBC Natural History Unit which explores the ocean's greatest predators. Narrated by actor Paul McGann, the series features footage of over 30 different types of shark and looks at the daily lives of the creatures that have survived to outlive the dinosaurs. The programme documents and explains the animal's complex behaviour including how they hunt, their social interactions and complex courting rituals, how they raise their offspring and even the threats they face in their natural habitat.