Steve Backshall finds a hippo track and explains how hippos walk and run. Special night-vision cameras get a close look at hippos feeding. 

Steve Backshall gets as close as possible to a secret hippo creche where hippo mums and their young spend the first part of their lives.

Steve Backshall spots a whale in the sea and explains how whales, dolphins and hippos are related. Using a special microphone Steve hears hippos underwater. 

With the aid of a flying camera, Steve Backshall and drone pilot Hansa get a rare view of hippos from above and we learn how they got their name. 

In this edition, Steve tells us all about the 'wheeze-honk' sound they make.