Kate tries to start a snowball fight with the macaque monkeys, Hamza tries to work out why the gorillas are grumpy, and will the reclusive baby red pandas venture out in time for Christmas?

Megan takes Reuben the reindeer for a walk, 18 water voles are released into the park, and has a second koala baby been born at the park?

Megan and the keepers hide lumps of meat on a Christmas tree to create a puzzle for the cheetahs, and can Hamza spot signs of a festive romance in the cheetah enclosure?

Ben and Kate compile a ‘naughty’ and ‘nice’ list, but what will be in store for the animals on Christmas morning?