Steve travels to the Pantanal in Brazil to swim with and study the monstrous anacondas that inhabit this region. But could his presence in the water trigger an attack?
Steve attempts to swim with Africa's most dangerous animal, the hippopotamus. Can he get close enough to study their secret underwater behaviour?
Steve travels to Mexico to find out more about the great white shark. Leaving the safety of his dive cage, can he get close enough to study this remarkable predator?
In the Sea of Cortez, Steve studies the hunting behaviour of the Humboldt squid, using himself as bait. Can he avoid being dragged into the abyss?