Hippo Watch with Steve Backshall

Steve Backshall is in search of the only wild animal that fills him with fear - the hippo - known for their lethal aggression. Steve heads to South Africa's Ndumo game reserve to find out what fuels their behaviour, and uncovers some of their surprising traits. He walks their pathways, dives into their waterways and uses the latest technology to let viewers glimpse into their secret world.