Chaos erupts when words go missing.

Livingstone is feeling unappreciated, but he gets the day off when a Corespore blast results in Livingstone turns into a happy-go-lucky twit.

Zoe and Tyrannicus join forces to shut down and drain the swamp. When Alex is struck with a swamp fever, Zoe puts aside her aversion and teams up with Allegra to track down the elusive plant.

Tyrannicus plants a story that Livingstone is to retire. Livingstone refutes the rumour, but many Animalians believe Tyrannicus. When the Truth Corespore blasts off, Animalia can only speak in lies, so the kids must find the Corespore before Tyrannicus tricks Livingstone into quitting.

Livingstone and Reenie are struck by the 'glums', a rare Animalian version of the blues. There is only one cure for the syndrome: a good, long laugh. But those affected with the glums don't find anything the least bit funny, so Alex, Zoe, G'Bubu and Iggy must criss-cross the kingdom in search of the funniest joke in Animalia.

The Creeper is accused of stealing from the Animalians, but without any hard evidence, Livingstone refuses to blame it. Encouraged by Tyrannicus, the enraged Animalians rush into the tunnels. It's a trap, however, and they become stuck. Meanwhile, the Creeper tries to sabotage the Core but is thwarted by Allegra, the only Animalian not in the tunnels.

Alex and the gang put on a production of Treasure Island, but a corespore blows mid-performance, sending Animalia into a treasure hunt frenzy. Alex and Zoe journey to Over and Beyond to find the missing corespore.

A Corespore blasts off and flies to the land of Over and Beyond, where fictional characters live. With this Corespore missing, Animalians are unable to agree about anything.

With the Creeper gone and peace restored to Animalia, Alex and Zoe decide it's time to go home. Livingstone also decides to take a much needed break, but before he can go, he must choose a new leader. Allegra and Tyrannicus vie for the position, but ultimately Livingstone knows that a good leader must lead with his heart.

After a few days in the 'real world', Alex and Zoe miss Animalia and want to return. But when they arrive, the city is in disrepair. They discover that time in Animalia moves at a different rate and a few days in their world is over a year in Animalia. Much to their surprise, G'Bubu and Iggy are no longer the leaders of Animalia, and instead King Tyrannicus is ruling the city.

The Creeper is back and he uses his knowledge of the Core to gain power and force the Animalians to do his bidding. Alex and Zoe are sent to protective custody, while G'Bubu and Iggy are searching the portals for Livingstone.