Season 15
17 episodes · first aired 2021-04-04
| Still | # | Title | Overview | Air date | Rating |
|---|---|---|---|---|---|
 | 01 | A Big Splash 2021-04-04 | 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. | 2021-04-04 | 0.0 |
 | 02 | The Call of the Deep 2021-04-04 | Maya attempts to take charge of Nya's life to solve her problems. Zane and Pixal respond to a distress call at sea. | 2021-04-04 | 0.0 |
 | 03 | Unsinkable 2021-04-11 | 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. | 2021-04-11 | 10.0 |
 | 04 | Five Thousand Fathoms Down 2021-04-11 | 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. | 2021-04-11 | 10.0 |
 | 05 | The Wrath of Kalmaar 2021-04-18 | 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. | 2021-04-18 | 10.0 |
 | 06 | Long Live the King 2021-04-18 | After Nya and Maya's rescue, the ninjas are escorted to Merlopia to face King Trimaar. However, a betrayal turns the ninjas into fugitives. | 2021-04-18 | 0.0 |
 | 07 | Escape from Merlopia 2021-04-25 | The ninjas survive the palace flooding — but are pursued by ripper sharks. Benthomaar comes to help and leads them to the hangar bay. | 2021-04-25 | 0.0 |
 | 08 | The Tale of Benthomaar 2021-04-25 | A flashback tells the tale of Benthomaar, revealing how King Trimaar finds him as a baby and raises Benthomaar as his own. | 2021-04-25 | 0.0 |
 | 09 | The Storm Amulet 2021-05-02 | 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. | 2021-05-02 | 0.0 |
 | 10 | Riddle of the Sphinx 2021-05-02 | 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. | 2021-05-02 | 0.0 |
 | 11 | Papergirl 2021-05-09 | As Kalmaar and the ninjas wage a battle in Ninjago City, the storm amulet ends up in the possession of a determined paper girl. | 2021-05-09 | 0.0 |
 | 12 | Master of the Sea 2021-05-09 | 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. | 2021-05-09 | 0.0 |
 | 13 | The Calm Before the Storm 2021-05-16 | The doomsday serpent, Wojira, rises from the sea. In Ninjago City, Glutinous emerges from the water with a dire warning. | 2021-05-16 | 0.0 |
 | 14 | Assault on Ninjago City 2021-05-16 | The ninjas leap into action after Kalmaar and Wojira arrive in Ninjago City, bringing a tsunami that floods the entire city. | 2021-05-16 | 0.0 |
 | 15 | Nyad 2021-05-23 | 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. | 2021-05-23 | 10.0 |
 | 16 | The Turn of the Tide 2021-05-23 | Kalmaar's temper proves too much for Wojira to handle during battle while the ninjas try to help Nya fulfill her destiny. | 2021-05-23 | 10.0 |
| 17 | Episode 17 | — | 0.0 |
Ratings shown are community scores. Once OMDB is wired, these become per-episode IMDB values.