Three koalas are coming to the Rhenen zoo. How do they react to their new enclosures after their long journey and do they find their way around? The bison in Rotterdam are experiencing a baby boom. There are already four healthy young when little Eli is born. He has to drink immediately after birth, but he just can't seem to do it. Will he make it through his first night...? And red-bellied tamarins Pablo and Chili are becoming parents of twins for the first time. The two little ones are growing like weeds and with them their mischievous nature!

Giant panda Wu Wen is torn when Xing Ya tries to seduce her. Elephant bull Tooth has been in the zoo for a year now, but things are still not going well between him and Duna. Okapi Mbuti gives birth to a healthy daughter: Makimzie. The bears in the Bear Forest in Rhenen live together with a pack of wolves. There is a fight over the food, especially during mealtime. Physically, the bears are a lot stronger than the wolves, but if you are not strong, you have to be smart, so the wolves use their famous 'pickpocket technique'.

Young giraffe stallion Jafari is very impressed by the scents that the ladies in the herd spread. However, he has very special habits to find out whether a female is fertile. Giant panda Wu shows abnormal behavior and eventually withdraws into her maternity den. Could this mean that she is indeed going to give birth to a long-awaited cub, or maybe even two? Koala male Arru suddenly shows worrying behavior: he sleeps on the ground. And that is abnormal behavior for a koala. It is feared that Arru may be ill.