REGION: ALL ZONES. LANGUAGE: ENGLISH. RUNNING TIME: 60MINS. RATING: PG. HIPPOS ARE DYING IN LARGE NUMBER AND THEIR CARCASSES ARE FOUND UP AND DOWN THE RIVER TO THE DELIGHT OF THE CROCODILES. WHAT IS CAUSING THESE DEATHS? FOLLOW THE LIVES OF 2 HIPPO BACHELORS AND A YOOUNG MOTHER AND HER CALF AS THEY JOURNEY TOWARDS THIS DEATH ZONE. 2008.