Today, we explore the impact of alpha animals around the park, kicking off with the arrival of a hot new zebra stallion. But, will he be able to tame an unruly herd of eight fiercely territorial females? And what will towering giraffe bull, Thorn make of this new stud stepping onto his turf? The cheetah family face yet more turmoil as the whole breeding group looks to be in jeopardy now the life of Dad, Carl hangs in the balance. A suspicious lump on his leg needs to be investigated, but with Carl’s life-expectancy nearing its latter days an anaesthetic comes with great risk. Kate gets a salty slobbering from Buster the sea lion and the lions face their mortal enemy as Jean and Caleb give them a true call of the wild.