The tiger cubs celebrate their first birthday; lion keeper Nat comes face-to-face with the one animal she's afraid of; and baby orangutan Madju gets a bouncing surprise.
A little blue penguin is brought to the vet clinic; a devastating turn of events causes the zoo to close its gates; and in Sumatra, Amy and Carly take a wild ride deep into the jungle.
Burma the elephant takes her first steps into life without Kashin; a big decision is made about tiger mum Molek; and in Sumatra, Amy and Carly try to teach the baby orangutans how to climb trees.
It's life or death for the baboon baby, as the new boys move in; the world's rarest parrot makes an emergency landing at the vet clinic; and Iwani's parents leave home.
The arrival of two newborn otters takes everyone by surprise; Christine is on a mission to help Iwani the siamang get his girl; and vet Richard goes bush to try and check on an old patient.
Visitors think they have seen a snake in the grass at the zoo; Christine heads to Australia to play matchmaker for Iwani; and the two baby otters have an appointment with the vet.
The lions aren't sure what to make of some strange intruders in their enclosure; a baby otter is rushed into emergency surgery; and Christine Tintinger has to say goodbye to a 25-year friendship.
Keeper Lana is in Australia to get to grips with some aggressive alligators; and it's an emotional day at Auckland Zoo, as the orangutans head to a new life in Florida.