Alison and Jeremy welcome their first saki monkey to the park. Ring-tailed lemur Houdini has the the team baffled with a strange medical condition.

Orangutan Hsiao-Quai takes her adopted daughter outside for the first time. Woolly monkey Yarima could be pregnant.

Alison responds to an urgent call from the RSPCA. Mueller's gibbon Fox gets special attention and it all kicks off at the Bachelor Boys.

There's great excitement as woolly monkey Enzo gets a new baby sister. Squirrel monkey Charlie meets his new family.

The police arrive when Alison and the RSPCA rescue marmosets from terrible conditions. Leader capuchin Gorilon goes under the knife following a nasty tangle.

Adolescent chimp Bryan tests Jeremy's patience with his emotional outbursts. Marmoset James is rescued from a pet shop full of predators.

See Monkey World's sister sanctuary in Vietnam.The team are on a mission to return rare pygmy lorises to the wild, and struggle to recapture golden-cheeked gibbon Da for his GPS.

It's a nervous time as chimp Tutti goes under anaesthetic. The health of woolly monkey leader Bueno starts to decline.

Marmoset James fights for his life in the park's hospital. Elsewhere, orangutan Hsiao-Ning comes of age.

The golden oldies have a new lease on life when Amy's capuchins take up residence in the Lodge.

Amy's capuchins display a head for heights and it's playroom party time for the boisterous Bachelor chimps.

Orangutan Gordon has become a gorgeous mature male, but the ladies can't see his inner beauty. New woolly monkey leader Chippy is strutting his stuff.

Squirrel monkey Fidget comes off second best when new boy Charlie arrives. Hananya's chimps go fishing for treats.

There's a noisy welcome for spider monkeys Hickory, Flint and Pumpkin. There is romance at the flirtatious capuchins.

Two lives hang in the balance when woolly monkey Sara undergoes an emergency C-section. Winslow's capuchins go on a treasure hunt.

It's round-the-clock care from Alison as baby woolly Bueno Jnr survives his first day. Woolly monkey Diego celebrates his birthday in style.

A fight at the lemur enclosure ends in serious injuries for Kaiyah. The future of marmosets Rattler and Tya's future remains uncertain.

The park bids farewell to woolly monkeys Julio and Diego as they start a new life. Meanwhile, the marmosets move into a plush new home.

Baby woolly monkey Bueno Jnr is going strong at four weeks old, while there is peace and harmony at last for marmoset Max. Baby orangutan Silvestre makes his mark.