Aris is still poorly; the baby woolly monkey finally gets a name; and the alpha male chimps exert their authority. But could there be a coup brewing?
The Chilean capuchins finally arrive in the UK, and there is bad news in the orang-utan house. Something has gone seriously wrong for Aris since his knee operation.
Orang-utan Aris needs surgery as his knee injury is worse than expected. Chimp Patricia finally relaxes in the company of alpha male, Hananya. And chimpanzee Seamus is in for a shock when he meets big male, Paco.
It is a big day for one of the park's naughtiest residents, chimpanzee Seamus.
It is a vet day at the park, as John Lewis checks up on the leg that chimp Jimmy nearly lost.
Seamus' brief period of calm comes to an abrupt end. Elsewhere, chimp Susie takes her new baby outside for the first time; and there are problems with the travel arrangements for the Chile trip.
The new baby woolly monkey meets its own kind for the very first time.
It is a day of tense introductions for the chimpanzees and the gibbons and the team begins work on its biggest mission to date - the rescue of almost 100 primates from Chile.
Work begins on the new gibbon rescue centre in Vietnam - and not a moment too soon, as the firstprimates are already arriving to begin their rehabilitation.
This special edition travels to Vietnam, where Monkey World is embarking on an exciting new project - its first foreign sanctuary for endangered primates. A new gibbon rescue centre is being built to protect these rare animals for the future.
Chimp toddler Bryan finally makes friends with the bad boy of his group, Seamus. Unfortunately, it is not long before they fall out again. Elsewhere, it is moving day for the gibbons as the park arranges a 'wife swap'.
The life of the new woolly monkey baby hangs in the balance just 24 hours after its birth.
There is a new baby in the woolly-monkey house, but the team is worried about its health. Elsewhere, baby orang-utan Dinda gets to grips with her outside enclosure. And stump-tailed macaque Koko struggles with her living space.
Tough love ensures that chimpanzee Bryan learns a painful lesson when he goes outside for the first time.
Young orang-utan Hsiao-Ning goes crazy on too much sugary fruit. Animal manager Jeremy prepares to take a huge risk to help adult male chimpanzee Jimmy with his leg wound.
New orang-utan Lingga meets her housemates, but young Joly is consumed by jealousy. In the chimp bachelor pad, a pile of blankets brings out Buxom's greedy side. And chimpanzee Jimmy has a very serious leg wound.
Confident young orang-utan Lingga has arrived from Paris. An operation on chimp Bryan's teeth reveals the damage caused by his traumatic past life. Stump-tailed macaque Koko needs a helping hand from animal manager Jeremy.
Animal manager Jeremy is in Paris, collecting a baby orang-utan called Lingga who will be joining Monkey World's ever-expanding orang creche.
Nerves are running high in the chimp nursery.