Ben Fogle and Kate Humble are back for another glorious summer series following the incredible lives of the exotic animals at Longleat Safari Park and the keepers who care for their every need.There was shock last year when a surprise family turned up at the park and established a home. Beavers started building a lodge on Half-Mile Lake alongside two hippos, half a dozen sea lions and a couple of big boats. What's even more surprising is that the last time beavers roamed this area was before Longleat House was completed in 1580. But are they still in residence? The keepers have been filming throughout the year using camera traps, and the signs are good that the beavers have settled, but when they scroll through the lakeside CCTV, the keepers make an extraordinary and completely unexpected discovery.Also, the tension between a female tiger and her daughter is approaching boiling point. Normally solitary animals in the wild, the tigers are showing signs of territorial strife in the park's drive-through. Will the keepers be able to stop these arguments escalating into a potentially lethal conflict?Ben is in the East Africa reserve to encourage the ostriches to run as fast as they might in the wild, while Megan sets a taste test for the hyenas. Kate discovers how the wolf pack and their keepers are doing since Eliska died, and plants a tree in her memory.