When the Nexo Knights are sloppy in a fight with Jestro, Merlok 2.0 sends them back to the Knights' Academy. Not only for a brush-up but to find out what Jestro is after in its hallowed halls.

When Jestro uses the Book of Greed to rob Auremville of its riches, he also gets Lance's parents as prisoners and these demanding rich folks are too much for even monsters to handle.

The Knights are tasked with protecting the King's valuable Ned Knights comic book during the Bookingheim Knight-a-Con. But with all the costumed kids there, will they recognize the real Jestro and Book of Monsters coming to get them?

Rival to the King, Jorah Tightwad thinks his knights, the Tighty Knighties, are easily better than the Nexo Knights, so he challenges King Halbert to prove who's better during the King's Birthday Tournament.

Axl and Chef Éclair must enter a cooking contest to try to keep Jestro from getting the hottest chili recipe in the realm.

When the other Nexo Knights decide they need a vacation from Clay, they send him on a holiday not knowing he's going to a resort that houses an evil book or that Jestro will be heading there too.

The Book of Monsters catching a cold means trouble for the Nexo Knights when he can create an entirely new kind of snotty monster.

The Book of Betrayal leads Jestro and his Monsters to Funnyton, the funniest town in the kingdom. When they Knights arrive to capture him, they discover to their shock that Jestro and the Book of Monsters are now the town's top comedians!

In a massive chase around Knighton, the Nexo Knights attempt to keep the Book of Betrayal out of the Book of Monster's grip. But the evil book is persistent. Will he get the final piece of his evil puzzle?

The Book of Monsters, having the final pieces of his evil plan in place, tries to take human form. Can the Nexo Knights and Merlok 2.0 stop the greatest threat they've ever faced? Or will the kingdom be plunged into darkness forever.

The kingdom is threatened by an army of Lava Monsters, and the inexperienced NEXO Knights must come to the rescue.

The Cloud of Monstrox and Jestro unlock a mysterious forbidden power; Merlok 2.0 and the Nexo Knights try to make the new Combo Nexo Powers work.

Jestro and the Cloud of Monstrox encounter the sculptor who helps unleash a horde of fierce garden gnomes on Knighton.

Jestro and the Cloud of Monstrox unleashes the Forbidden Power Ravaging Rot on Knighton, turning everything into green gooey rot, but Robin has an awesome new invention that could help the Nexo Knights.

The Nexo Knights have their powerful shields stolen by Robot Hoodlum and his Merry Mechs; something is coming to life in the petrified forest and it doesn't like knights.

Villagers are being enslaved to dig out three ancient warriors whom the Cloud of Monstrox wants to bring back to life. Can the Nexo Knights make their Combo Nexo Powers work inside a mountain?

At K.O.M.A. (Knightonia Official Museum of Art) Monstrox learns that a Forbidden Power tablet is hidden and he will do anything to get it; especially if King Halbert happens to visit at the same time.

The old Lava Monsters are back and a Forbidden Power is in the middle of their new village of Burningham! But whose side are the Lava Monsters on?

The three Harpies have kidnapped Macy's mother Queen Halbert, and the Nexo Knights use everything in their power to rescue her.

The Cloud of Monstrox grows more powerful with every Forbidden Power Jestro inserts; the capitol of Knighton is under attack; the Fortrex is damaged and Clay is turned to stone.

Party time in Knighton! The mood is down so the King decides to throw a party. In the meantime Jestro attacks the Fortrex, but he is confronted with the new Nexo Power "The Wedgie of Doom".

Using his Stone to Life magic the Cloud of Monstrox turns Clay into a living, fighting, breathing stone fighting knight. But will Clay use his forces to fight for good or for evil? Does he have a choice?

Clay wakes up in the poor town of Nothing Hill which literally has nothing. Will Clay remember who he is and what he is fighting for? His friends try to help him, but Jorah Tightwad and his Bots get in the way.

The Nexo Knights decide to use Clay to infiltrate the enemy camp but first Clay needs to learn how to be a good spy. Agent Shield, Jack Shield helps them with that.

Jestro and the Cloud of Monstrox builds a new stone army from giant building blocks to crush Knighton. The Nexo Knights try to convince Rockowski, a demolition expert, to help them.