A look inside the croc kill zone and see why these social predators are so deadly.

Steve tries to figure out if crocodiles are better off living in the wild or within the confines of the reserve; looking the world's oldest croc in the eye and how a crayfish reshapes an entire ecosystem.

Steve faces the hippopotamus, his biggest fear; He explains why it is considered Africa's most dangerous species, how humans get its communication signals wrong and explore the link between hippos and whales.

Steve gets a first-hand look at what makes Nile crocodiles so deadly and helps a team of scientists relocate a bunch of man-eaters.