So the final puzzle forces ninja to question the true meaning of the Green Ninja Prophecy. Solving the puzzles releases a new peril for the Ninja to face. Will memories of their greatest victories be enough to defeat it?
ThunderFang is freed, and only the Ninja stand between the Shatter Dragon of Chaos and his revenge.
The Ninja hurry to the First Land to stop the Forbidden Five from freeing ThunderFang, and Wyldfyre discovers a drastic cure to Roby's decay.
Laval and Li'Ella's relationship grows as he gives her a tour of the Lion City. But distracted, he misses a key battle against the Hunters. Tormak joins the fight and saves the day. But the Lion King Lagravis is captured and brought to the Ice Fort. Who will lead the Lions now?!?
Something mysterious lurking the jungle wrecks a construction site, and Hudson is convinced a ghost is responsible - but it might be something even more surprising.
Cragger angers the Gorilla tribe and they march to the Crocodile Swamp to teach him a lesson. But the Gorilla Mechs are not fit for the swampy water and the Lions and Eagles must come to the rescue. The only problem is that the Lions don't like water ... at all!
The NEXO-Knights must fight Jestro's Monsters of Destruction which are attacking all over the Kingdom. But Merlok smells a trap…is he right? In a dark, destroyed part of the kingdom, Jestro arrives at the ruins of a HUGE castle. The Book of Monsters knows this place: the great evil wizard Monstrux lived here. The Book sniffs out some powerful magic in the ruins: “The Book of Destruction.” With this, The Book tells Jestro they can destroy the NEXO-Knights and then attack the King's Castle and cause massive destruction. Jestro creates destructive monsters and sends them all over the realm, so the Knights must separate and fight single combats all over the place. The Knights lose these battles (lesson: they have to work as a team!) And, just when the Knights are scattered across the Kingdom, Jestro attacks the King's Castle! It looks like all is lost. When Aaron, who has escaped, returns to see Jestro's attack, he realizes he must gather his fellow Knights. Merlok says it's very dangerous, but Aaron says he must take the risk to gather the Knights and save Knighton.
Loki arrives at Avengers Tower declaring he wants to be an Avenger. Our heroes are skeptical, but Iron Man decides to make Loki an ”Avenger In Training”. It's a great plan until Thanos arrives on Earth looking for Loki
The four ninja go undercover as a dance troupe and enter a talent contest in their quest to win “The Blade Cup” where one of the fang blades is hidden.
Nova pulls off a series of pranks, leaving her friends scrambling and laughing. However, things take a dark turn when one of her pranks goes awry and sends the group into a terrifying situation.
The four ninja go undercover as a dance troupe and enter a talent contest in their quest to win “The Blade Cup” where one of the fang blades is hidden.
Practicing for the local snow lodge's big snowboard race, Mia has an accident and hurts her ankle. She insists it's no biggie, but when she tries to resume practice, the normally fearless Mia finds she's now terrified of snowboarding! At the local snow lodge's Snowboard Meet, ace snowboarder Mia, trying to raise money for a new Heartlake City animal shelter, enters the fiercest race of all – the Boardercross. Then, while practicing, she has an accident and hurts her ankle. She insists it's no big deal, but once she heals and tries to resume practice, the usually fearless Mia finds she's now terrified of snowboarding! With the help of her Friends, she tries hard to overcome her fear, but her nightmarish visions of snowboard monsters and jeering snowmen have her shaking in her bed. She backs out of the race, disappointing her Friends and herself. Finally, when an avalanche traps Fiona, Mia is forced to overcome her fears and race to the rescue.
Vic and Owen find themselves, along with Sinjin, in the middle of a massive dino-fight in the old Jurassic Park Visitor Center.
At the night of the Hundred Year Moon, the Wolves are running wild and causing havoc. Crooler kidnaps a young gorilla girl to lure Laval, Eris and Gorzan the Gorilla out to rescue her. It is a very dangerous night, but finally Skinnet the Skunk's foul odor may prove useful.
The Knights find themselves trapped in a maze looking for the Book of Deception. But will they actually get their hands on it, or will it keep deceiving them? The Knights travel to the Hill Country in the northern part of Knighton to Axl's home town of DIGGINGTON (where they realize that all of Axl's family look just like him.) While they're there, Merlok 2.0 detects something…one of the Magic Books! It's “The Book of Deception.” They go to find it and discover it ended up under a mountain. And, to make matters worse, the magic book has built a maze around itself to keep it from being found (it is deceptive!) As the NEXO-Knights enter the maze from one side, Jestro enters from the other the Book of Monsters has led him to the maze to get The Book of Deception, too. It's a race through this confusing maze to see who can get the book first. Ava figures out the maze is the Whackman maze from a videogame. After help from Axl's people to defeat Jestro and win the book, the knights discover it's a FAKE BOOK of deception. The Book of Deception created a fake copy of itself!
Being the King of Wakanda is tough -- especially when you're also the Black Panther! When Thanos arrives from outer space and threatens to destroy Earth, the Black Panther leaps into action and defeats him with the help of Earth's Mightiest Heroes. But the situation only gets worse when rogue villains Killmonger and Klaue team up with the Mad Titan to take the fight to Black Panther's homeland! Can the Panther pounce on their perilous plan before Wakanda is pulverized?
When the four ninja follow the mysterious falcon into the woods, they stumble on a hidden work shop where Zane learns the secret about his past and in the process, finally knowing who he is, he is the first ninja to unlock his true potential.
Aliya and Liann take matters into their own hands as they go undercover to solve the mystery of Ley-La, the secretive and enigmatic figure who's been lurking around the periphery of their lives. Posing as reporters, they dig deep and discover a key clue.
With the Never Witch on the loose, the dream chasers head to Oz and Albert's landing to use Oz's enchanted telescope. But what should have been?
The Never Witch's sudden assault forces the dream chasers to split up. While the main team rushes to the mysterious Dunes of Duralumina, Nova and Sneak are left behind to defend.