In this second episode of this brand new series, presenter Hugh Fearnley-Whittingstall and wildlife experts Lucy Cooke, Patrick Aryee and Giles Clark travel to different corners of the globe to reveal amazing stories about animal relationships. Along the way the team uncovers the amazing bonds that animals have with each other, explore some of the remarkable relationships they can have with us, and meet the scientists who dedicate their lives to understanding these extraordinary discoveries. In Costa Rica, Hugh looks at why capuchin monkeys have such a fantastic team spirit; biologist Patrick investigates our relationship with nature's most infamous scavenger, finding out how vultures are saving lives. Zoologist Lucy is in Kentucky in the US, discovering the medicine that may improve a rare pig's relationship problems. Meanwhile, conservationist Giles ventures into the rainforests in Thailand to find out how a clever matchmaking technique could help save one of the planet's most stunning big cats - the clouded leopard - from extinction. On the trail of another extraordinary story, Giles also heads to Kenya to meet the people who as a result of the rhino-poaching crisis in Africa have struck up what could be one of the most emotional relationships between a man and a wild, endangered animal.