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.

Marmoset Max enjoys peace and harmony, while Baby orang-utan Silvestre makes his mark with nursery boss A-mei. Plus, woolly monkey Bueno Jnr is four weeks old and going strong.