Ninjago: Masters of Spinjitzu: Seabound
When Nya's powers are disrupted, the Ninja set off in search of answers and find themselves at the bottom of endless oceans where they discover that her powers are linked to an ancient mythical creature.
Season 15 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of Ninjago: Masters of Spinjitzu Season 14.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Season overview
When Nya's powers are disrupted, the Ninja set off in search of answers and find themselves at the bottom of endless oceans where they discover that her powers are linked to an ancient mythical creature.
Episode Guide
Season 15 Progress Shield
A Big Splash
Apr 4, 2021 · 10 min
The ninjas ambush a new villain named Miss Demeanor. Nya creates a water cyclone to stop her but loses control of it, threatening a nearby village.
The Call of the Deep
Apr 4, 2021 · 10 min
Maya attempts to take charge of Nya's life to solve her problems. Zane and Pixal respond to a distress call at sea.
Unsinkable
Apr 11, 2021 · 10 min
Nya, Jay, Zane, Pixal and Lloyd board a new submarine, the Hydro Bounty, and set off to find the source of the energy signal disrupting Nya's powers.
Five Thousand Fathoms Down
Apr 11, 2021 · 21 min
Nya and Maya use underwater suits to travel to an ancient temple after they realize its power source is the only way to get the Hydro Bounty running.
The Wrath of Kalmaar
Apr 18, 2021 · 10 min
Nya and Maya attempt to get out of a tough predicament. Meanwhile, Jay risks his life while trying to restore power to the Hydro Bounty.
Long Live the King
Apr 18, 2021 · 10 min
After Nya and Maya's rescue, the ninjas are escorted to Merlopia to face King Trimaar. However, a betrayal turns the ninjas into fugitives.
Escape from Merlopia
Apr 25, 2021 · 10 min
The ninjas survive the palace flooding — but are pursued by ripper sharks. Benthomaar comes to help and leads them to the hangar bay.
The Tale of Benthomaar
Apr 25, 2021 · 21 min
A flashback tells the tale of Benthomaar, revealing how King Trimaar finds him as a baby and raises Benthomaar as his own.
The Storm Amulet
May 2, 2021 · 10 min
The ninjas return to the island of the Keepers and ask their leader to keep an amulet safe in Ninjago City — but they make a surprising discovery.
Riddle of the Sphinx
May 2, 2021 · 10 min
Kai, Ray, Cole, Wu, and Misako receive Nya's warning and rush to the Explorer's Club. Benthomaar encourages Nya to use her power in a surprising new way.
Papergirl
May 9, 2021 · 10 min
As Kalmaar and the ninjas wage a battle in Ninjago City, the storm amulet ends up in the possession of a determined paper girl.
Master of the Sea
May 9, 2021 · 10 min
Benthomaar tells Nya the tale of Nyad. Meanwhile, Master Wu, Kai, Cole, Ray, and Misako try to keep Kalmaar from taking off with the storm amulet.
The Calm Before the Storm
May 16, 2021 · 10 min
The doomsday serpent, Wojira, rises from the sea. In Ninjago City, Glutinous emerges from the water with a dire warning.
Assault on Ninjago City
May 16, 2021 · 10 min
The ninjas leap into action after Kalmaar and Wojira arrive in Ninjago City, bringing a tsunami that floods the entire city.
Nyad
May 23, 2021 · 21 min
Overpowered by Wojira, the ninjas retreat to the NGTV building to regroup. Nya might make a decision that she may never be able to come back from.
The Turn of the Tide
May 23, 2021 · 10 min
Kalmaar's temper proves too much for Wojira to handle during battle while the ninjas try to help Nya fulfill her destiny.