The games begin for keepers when orangutan Malu destroys his playroom. An elderly horse must undergo a risky procedure, and keepers must decide if it's time to say goodbye to one of the zoo's beloved giraffes.

A routine health check takes a frightening turn for lion brothers Lwazi and Ato. Keepers anxiously await to see if otter couple Odie and Paula are expecting, and a gorilla called Kanzi must prove she can receive vital medical care.

A team races to save a wombat named Daisy suffering from mysterious health issues before it's too late. Keepers Georgie and Luke venture on a challenging road trip to transport a giraffe calf, and a secret hidden underneath the Melbourne Zoo is revealed.