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.

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.