Paddy's chimps go mad for mangoes and rumours abound of a weighty new arrival from South Africa. Plus, Alison saves an old pet squirrel monkey that desperately needs a new home.
Disturbing footage convinces Alison to rescue an adult female chimpanzee working in the tourist industry in Mexico, who urgently needs the team's help. The nursery chimps have a play session.
Jonathan is over groomed and has gone bald, while Tom, one of the alpha male capuchins, has died. Elsewhere, the chimps are given walnuts and Jestah gets more than his fair share.
A baby chimp tries to prove he is grown up enough to go it alone. The Bachelor Boys' reputation, meanwhile, takes a hit when they become frightened of a new toy.
A big decision must be made when alpha male Hananya continues to exhibit violent behaviour. Chimps Simon and Eveline, meanwhile, compete in a swing-off and there is some dental surgery to be done.
Resident capuchin TJ joins the new Chile arrivals, but he seems to be in a mischievous mood, and Alpha male chimp Paddy has to step in and keep his unruly troop in line. Elsewhere, orangutan Amy is pregnant.
Hananya shows that he is not so tough when it comes to needles, while four-month-old woolly monkey Paulo is being hand-reared by Mike and Alison. Elsewhere, the other chimps enjoy a `banana-fishing' expedition.
The team are forced to step in when the chimp introduction goes wrong and Ben is injured by the alpha male, orang-utan Hsiao-Quai struggles with her ever-growing son Kai, and the park's staff prepare to welcome another baby orang-utan into the fold.
Wildlife vet John Lewis is given a run for his money when he tries to sedate two excitable chimps. Plus, the male capuchins get used to life together.
Eighty-eight capuchin monkeys rescued from a research laboratory in Chile wake up to their first morning at Monkey World. Rodders has a run-in with a sticky melon, and Seamus the chimp comes face to face with alpha male Butch.
Alison looks forward to the prospect of baboons being at the park, while recently arrived marmoset Clyde, rescued from the pet trade, braves the great outdoors for the first time.
A visit from the vet awaits one of the park's strangest residents, while the small monkey team lose the battle to save tragic marmoset Koba, who had been taken out of the pet trade.
Alison travels to Hampshire to rescue marmoset Clyde from a life in the pet trade, while the young orangutan Hujan gets to meet with older male Bulu in the nursery.
Elderly marmoset Jenny gets a visit from the vet before the arrival of a new life partner, while orangutan youngster Hujan begins to adjust to living life in the nursery.
It is moving day for young male orangutan Hujan, who is on his way to join the nursery group, while Alison tries to help rescued marmoset Koba build up some much-needed strength.
Rescued marmoset Koba clings to life after arriving at the park in a stricken state, and the lemurs at Malagasy find themselves dealing with a quite tricky tree-top challenge.
It is vet day for some of the primates, and Nelly the loris causes some concern during the checkup. Meanwhile, Sasha the chimp gets to know some of Bryan's group while Teo the gibbon tackles some hanging feeders.
There are plenty of comings and goings at the park as a marmoset family heads to a new home, Tya returns looking for love, and the Barn Woollies welcome baby Xenia to their tight-knit group.
Dr Alison Cronin and animal manager Jeremy return from a trip to Argentina with Sasha and Kangoo, two chimpanzees are given a new home at the park, and Tuan's orangutans receive a treat.
Alison and Jeremy prepare to fly Sasha and Kangoo from Argentina to Dorset, which means crating and loading them in the middle of the night.