Baby golden-cheeked gibbon Mikado ventures outside for the first time, while animal director Jeremy tries to coax overweight Oshine to the outdoor enclosure - but to get there, the reluctant orang-utan must first navigate a series of tunnels. Elsewhere, chimp Lulu refuses to take her medicine.

Chimp Kiki arrives at the park after a long journey from Lebanon, but having lived on her own for eight years, she is unnerved by the sounds of her fellow primates in the adjacent room. Meanwhile, the keepers have reason to celebrate when golden-cheeked gibbon Zoey gives birth in the middle of the night.