Kate Humble and Ben Fogle are back for another sunny summer special packed full of stories from the host of exotic animals living in the heart of Wiltshire. The gorilla team are forced to call in the vets for Alfie when it seems an abscess could signify something more sinister. But how do you sedate a 150kg gorilla? And what do you do when he struggles to come around from the anaesthetic? Tragedy strikes Penguin Island once again as a chick is orphaned and then forced to overcome a life-changing disability. Meanwhile, Jean Johansson finds out just how much the baby meerkats have grown when she tries to catch them. Jean also helps to feed the hand-reared wallaby joey and finds out why climbing a tree won't save you from a lion.