A bust-up at the lemur enclosure ends in serious injuries for Kaiyah. Siamangs Sam and Sasak are back singing in harmony, but marmosets Rattler and Tya's future is uncertain.
Alison provides round-the-clock care for a baby monkey that has survived its first day. Plus, the staff help woolly Diego celebrate his birthday.
Woolly monkey Sara undergoes an emergency Caesarean section. Golden-cheeked gibbon Teo takes his first wobbly steps twenty metres high and Winslow's capuchins go on a treasure hunt.
There is a noisy welcome for spider monkeys Hickory, Flint and Pumpkin, and love is in the air for the flirtatious capuchins. Plus, big girl Oshine shares a giant ice lolly.
A Siamang gibbon is in danger of losing his mate when she is struck by a mysterious illness, and a squirrel monkey is pushed out by a new arrival.
Orang-utan Gordon has grown into an attractive mature male but the ladies are struggling to see his inner beauty. Over at the woollies, the new leader is strutting his stuff.
Orang-utan Hsiao-Ning settles into her new home at Rostock Zoo, but she is a bit too feisty for her suitor Sabas. Plus, the boisterous Bachelor chimps have a playroom party.
The keepers say a sad goodbye as orangutan Hsiao-Ning moves to Rostock Zoo in Germany, and Amy's capuchins take up residence in the lodge.
Marmoset James, who only arrived recently, ends up fighting for his life in the park's hospital, and a decision must be made when orang-utan Hsiao-Ning comes of age in the nursery.
It's a nervous time as chimp Tutti goes under anaesthetic. The health of woolly monkey leader Bueno starts to decline.
Alison and Jeremy are travelling to Wales to collect monkeys from a zoo The monkey team is preparing for their arrival.
Alison and Jeremy undertake one of the park's biggest primate rescues in recent years.
After weeks of planning two of the park's chimpanzee groups are about to swap homes.
Female orangutans, RoRo and Lucy, are reintroduced in the hope they can learn to live together marmoset Gizmo gets the all-clear Alison plans a house swap to ease the conflict between Bart's group and the bachelor chimps.
Vets are called to the park due to serious concerns for the health of elderly chimp Zoe.
Alison's on an emergency mission to the Midlands to collect a Geoffroys marmoset, separated from his sibling.
Tragic news strikes the park as immensely respected wildlife vet John Lewis passes away chimp Jestah returns outside with his troop following his surgery the squirrel monkeys feast on mealworms.
Veterinarian Cesar and his team treat marmoset Jenny, capuchin Abby, squirrel monkey Lopez and others at the capuchin lodge, Franco and Fabian learn to take a voluntary hand injection.
Stumpie Freddy's dental issue proves taxing for wildlife vet John Lewis.
Vet Cesar Sastre visits the park as marmoset Bart gets a health check and a vasectomy.