While answering a report of trouble at Yak Castle, Second Squad finds TwinMasters waiting for them. When he hits the team with chaotic energy and turns them into his puppets, they return to Big Green and capture First Squad. Back at Yak Castle, the kidnapped First Squad must fight for their lives, and those of their zombified compatriots.

There’s a thief in Big Green. When the villain turns out to be a baby raccoon that Mystique Sonia has secretly adopted, Lin Chung reacts. Meanwhile ApeTrully has been captured by Pangolin Queen and turned into her special pet. Now First Squad must fight the Pangolin warriors as they combine to form a Wooden Giant. When First Squad wins the day, Pangolin Queen must give up her ApeTrully pet. She has learned a valuable lesson about “collecting pets”...

When ApeTrully and the Calabash Army disappear in the Dark Forest, First Squad deploys. Surprisingly they find their friends and many other animals suspended in goo-like holiday ornaments hanging from tree branches. Turns out they are all the collection of the Slug King and his warriors and they’re not about to give up their menagerie. After a hard battle, Slug King sees the error of his ways. Too bad the Zebra Brothers turn all the goo into a giant...

After an ill-advised attack against Big Green, Seagull King and his ungainly son decide to join the rebel cause. Once inside the turtle shell base, the haughty Seagull King puts everyone down, including his princely offspring. Lin Chung takes the young gull under his own wing and teaches him to fight, which comes in handy as the Flying Squirrels are rampaging. Seagull Prince turns the tide of the battle and earns his father’s trust.

When HighRoller and his Fying Fish minions steal Mighty Ray’s magic eyeballs during an attack, Hidden Kingdom is in grave danger. TwinMasters uses their powers to create a storm of unequalled chaotic energy. As First Squad deploys, team members are amazed to learn that Mighty Ray is highly adept at fighting blind; he’s done it before. Now, ApeTrully must lead Mighty Ray and First Squad deep into the Monkey King’s temple, reveal the true source...

ApeTrully and First Squad investigate a call from villagers being swallowed up by the ground itself. Our heroes soon find themselves in an amazing underground cavern, at the castle of the wayward Star-Nosed Moles. The creatures quickly capture all but ApeTrully and Lin Chung. Together our heroes must save their team, free the villagers and, ultimately, the Moles from a giant falling stalactite.

After First Squad defeats the Lizards in battle, Lizard King offers to join Big Green and learn more about human behavior. Back at the base, Lin Chung quickly grows suspicious of the King’s true intentions. Turns out Lin Chung is right. While Lizard King is showing off his artistic capabilities, he literally photo-freezes everyone but Lin Chung and tries to turn them over to the TwinMasters.

When TwinMasters uses Yan Ching as a pawn, the Jelly Fish King unwittingly delivers First Squad and Big Green into a dangerous trap. Lured to the island hiding place of TwinMasters’ Demon Heart, Big Green is attacked by Sea Elephants armed with squid bombs. Once ashore, they are soon trapped inside the cave that holds the heart itself - which turns out to be a ticking time bomb. With Lin Chung’s Harmonic Energy now depleted from battle, escape...

When First Squad, ApeTrully and Crocodile King travel to the far North to investigate reports of animals and humans fleeing for their lives, they come across the work of TwinMasters. The villain has resurrected a T-Rex and, along with him, a Primitive Man. A battle ensues, but when Lin Chung saves the Croc King’s life, the Primitive Man switches sides — appreciating the close relationship between man and reptile — a mirror of his relationship...

Mr. No Hands is fed up with Mighty Ray and Mystique Sonia’s inability to work together and decides it’s time they learned a real lesson about teamwork. He sends them off together to a far away canyon to retrieve the juice of the Grakka plant. However, unbeknownst to Mr. No Hands, TwinMasters has turned the ants of the canyon into monster beings and the two heroes fall into their trap. To survive, Ray and Sonia have to learn to really work together...