S11E12: Under Siege
Having learned the identity of the "Treacherous Deceiver," the ninjas find themselves under siege at the Monastery.
Previous Episode 
Season 1
Rise of the Snakes
S1E1 / 11 Jan 2012
Home
S1E2 / 18 Jan 2012
Snakebit
S1E3 / 25 Jan 2012
Never Trust a Snake
S1E4 / 01 Feb 2012
Can of Worms
S1E5 / 08 Feb 2012
The Snake King
S1E6 / 15 Feb 2012
Tick Tock
S1E7 / 22 Feb 2012
Once Bitten, Twice Shy
S1E8 / 07 Mar 2012
The Royal Blacksmiths
S1E9 / 14 Mar 2012
The Green Ninja
S1E10 / 21 Mar 2012
All of Nothing
S1E11 / 28 Mar 2012
The Rise of the Great Devourer
S1E12 / 04 Apr 2012
Day of the Great Devourer
S1E13 / 11 Apr 2012
Season 2
Darkness Shall Rise
S2E1 / 18 Jul 2012
Pirates vs. Ninja
S2E2 / 25 Jul 2012
Double Trouble
S2E3 / 01 Aug 2012
Ninjaball Run
S2E4 / 08 Aug 2012
Child’s Play
S2E5 / 15 Aug 2012
Wrong Place, Wrong Time
S2E6 / 22 Aug 2012
The Stone Army
S2E7 / 03 Oct 2012
The Day Ninjago Stood Still
S2E8 / 10 Oct 2012
The Last Voyage
S2E9 / 17 Oct 2012
Island of Darkness
S2E10 / 24 Oct 2012
The Last Hope
S2E11 / 07 Nov 2012
Return of the Overlord
S2E12 / 14 Nov 2012
Rise Of The Spinjitzu Master
S2E13 / 21 Nov 2012
Season 3
The Surge
S3E1 / 29 Jan 2014
The Art of the Silent Fist
S3E2 / 29 Jan 2014
Blackout
S3E3 / 16 Apr 2014
The Curse of the Golden Master
S3E4 / 16 Apr 2014
Enter the Digiverse
S3E5 / 13 Jul 2014
Codename: Arcturus
S3E6 / 13 Jul 2014
The Void
S3E7 / 26 Nov 2014
The Titanium Ninja
S3E8 / 26 Nov 2014
Season 4
The Invitation
S4E1 / 23 Feb 2015
Only One Can Remain
S4E2 / 02 Mar 2015
Versus
S4E3 / 09 Mar 2015
Ninja Roll
S4E4 / 16 Mar 2015
Spy For a Spy
S4E5 / 23 Mar 2015
Spellbound
S4E6 / 30 Mar 2015
The Forgotten Element
S4E7 / 31 Mar 2015
The Day of the Dragon
S4E8 / 01 Apr 2015
The Greatest Fear of All
S4E9 / 02 Apr 2015
The Corridor of Elders
S4E10 / 03 Apr 2015
Season 5
Winds of Change
S5E1 / 29 Jun 2015
Ghost Story
S5E2 / 30 Jun 2015
Stiix & Stones
S5E3 / 01 Jul 2015
The Temple on Haunted Hill
S5E4 / 02 Jul 2015
Peak-a-Boo
S5E5 / 03 Jul 2015
Kingdom Come
S5E6 / 06 Jul 2015
The Crooked Path
S5E7 / 07 Jul 2015
Grave Danger
S5E8 / 08 Jul 2015
Curseworld (1)
S5E9 / 09 Jul 2015
Curseworld (2)
S5E10 / 10 Jul 2015
Season 6
Infamous
S6E1 / 09 Jun 2016
Public Enemy Number One
S6E2 / 16 Jun 2016
Enkrypted
S6E3 / 23 Jun 2016
Misfortune Rising
S6E4 / 30 Jun 2016
On a Wish and a Prayer
S6E5 / 11 Jul 2016
My Dinner with Nadakhan
S6E6 / 12 Jul 2016
Wishmasters
S6E7 / 13 Jul 2016
The Last Resort
S6E8 / 14 Jul 2016
Operation Land Ho!
S6E9 / 15 Jul 2016
The Way Back
S6E10 / 15 Jul 2016
Season 7
The Hands of Time
S7E1 / 15 May 2017
The Hatching
S7E2 / 16 May 2017
A Time of Traitors
S7E3 / 17 May 2017
Scavengers
S7E4 / 18 May 2017
A Line in the Sand
S7E5 / 19 May 2017
The Attack
S7E6 / 22 May 2017
Secrets Discovered
S7E7 / 23 May 2017
Pause and Effect
S7E8 / 24 May 2017
Out of the Fire and Into the Boiling Sea
S7E9 / 25 May 2017
Lost in Time
S7E10 / 26 May 2017
Season 8
The Mask of Deception
S8E1 / 16 Apr 2018
The Jade Princess
S8E2 / 23 Apr 2018
The Oni and the Dragon
S8E3 / 30 Apr 2018
Snake Jaguar
S8E4 / 07 May 2018
Dead Man's Squall
S8E5 / 14 May 2018
The Quiet One
S8E6 / 21 May 2018
Game of Masks
S8E7 / 22 May 2018
Dread on Arrival
S8E8 / 23 May 2018
True Potential
S8E9 / 24 May 2018
Big Trouble, Little Ninjago
S8E10 / 25 May 2018
Season 9
Firstbourne
S9E1 / 03 Sep 2018
Iron & Stone
S9E2 / 04 Sep 2018
Radio Free Ninjago
S9E3 / 05 Sep 2018
How to Build a Dragon
S9E4 / 06 Sep 2018
The Gilded Path
S9E5 / 07 Sep 2018
Two Lies, One Truth
S9E6 / 10 Sep 2018
The Weakest Link
S9E7 / 11 Sep 2018
Saving Faith
S9E8 / 12 Sep 2018
Lessons for a Master
S9E9 / 13 Sep 2018
Green Destiny
S9E10 / 14 Sep 2018
Season 10
The Darkness Comes
S10E1 / 19 Jan 2019
Into the Breach
S10E2 / 26 Jan 2019
The Fall
S10E3 / 02 Feb 2019
Endings
S10E4 / 09 Feb 2019
Season 11
Wasted True Potential
S11E1 / 22 Jun 2019
Questing For Quests
S11E2 / 22 Jun 2019
A Rocky Start
S11E3 / 29 Jun 2019
The Belly of The Beast
S11E4 / 29 Jun 2019
Boobytraps and How to Survive Them
S11E5 / 06 Jul 2019
The News Never Sleeps
S11E6 / 06 Jul 2019
Ninja vs Lava
S11E7 / 13 Jul 2019
Snaketastrophy
S11E8 / 13 Jul 2019
Powerless
S11E9 / 20 Jul 2019
Ancient History
S11E10 / 20 Jul 2019
Never Trust a Human
S11E11 / 27 Jul 2019
Under Siege
S11E12 / 27 Jul 2019
The Explorers Club
S11E13 / 03 Aug 2019
Vengeance is Mine!
S11E14 / 03 Aug 2019
A Cold Goodbye
S11E15 / 10 Aug 2019
The Never-Realm
S11E16 / 17 Aug 2019
Fire Maker
S11E17 / 24 Aug 2019
An Unlikely Ally
S11E18 / 24 Aug 2019
The Absolute Worst
S11E19 / 07 Sep 2019
The Message
S11E20 / 07 Sep 2019
The Traveler's Tree
S11E21 / 14 Sep 2019
Krag's Lament
S11E22 / 14 Sep 2019
Secret of the Wolf
S11E23 / 21 Sep 2019
The Last of the Formlings
S11E24 / 21 Sep 2019
My Enemy, My Friend
S11E25 / 28 Sep 2019
The Kaiju Protocol
S11E26 / 05 Oct 2019
Corruption
S11E27 / 12 Oct 2019
A Fragile Hope
S11E28 / 19 Oct 2019
Once and For All
S11E29 / 26 Oct 2019
Awakenings
S11E30 / 02 Nov 2019
Season 12
Would You Like to Enter Prime Empire?
S12E1 / 19 Jul 2020
Dyer Island
S12E2 / 19 Jul 2020
Level Thirteen
S12E3 / 19 Jul 2020
Superstar Rockin´ Jay
S12E4 / 19 Jul 2020
I am Okino
S12E5 / 26 Jul 2020
The Glitch
S12E6 / 26 Jul 2020
The Cliffs of Hysteria
S12E7 / 02 Aug 2020
The Maze of the Red Dragon
S12E8 / 02 Aug 2020
One Step Forward, Two Steps Back
S12E9 / 09 Aug 2020
Racer Seven
S12E10 / 09 Aug 2020
The Speedway Five-Billion
S12E11 / 16 Aug 2020
Stop, Drop and Side Scroll
S12E12 / 16 Aug 2020
Ninjago Confidential
S12E13 / 23 Aug 2020
The Prodigal Father
S12E14 / 23 Aug 2020
The Temple of Madness
S12E15 / 30 Aug 2020
Game Over
S12E16 / 30 Aug 2020
Season 13
Shintaro
S13E1 / 06 Jul 2020
Into the Dark
S13E2 / 06 Jul 2020
The Worst Rescue Ever
S13E3 / 07 Jul 2020
The Two Blades
S13E4 / 08 Jul 2020
Queen of the Munce
S13E5 / 09 Jul 2020
Trial By Mino
S13E6 / 10 Jul 2020
The Skull Sorcerer
S13E7 / 13 Jul 2020
The Real Fall
S13E8 / 14 Jul 2020
Dungeon Party!
S13E9 / 15 Jul 2020
Dungeon Crawl!
S13E10 / 16 Jul 2020
Grief-Bringer
S13E11 / 17 Jul 2020
Masters Never Quit
S13E12 / 20 Jul 2020
The Darkest Hour
S13E13 / 21 Jul 2020
The Ascent
S13E14 / 22 Jul 2020
The Upply Strike Back!
S13E15 / 23 Jul 2020
The Son of Lilly
S13E16 / 24 Jul 2020
Season 14
Uncharted
S14E1 / 07 Mar 2021
The Keepers of the Amulet
S14E2 / 07 Mar 2021
The Gift of Jay
S14E3 / 14 Mar 2021
The Tooth of Wojira
S14E4 / 14 Mar 2021
Season 15
A Big Splash
S15E1 / 04 Apr 2021
The Call of the Deep
S15E2 / 04 Apr 2021
Unsinkable
S15E3 / 11 Apr 2021
Five Thousand Fathoms Down
S15E4 / 11 Apr 2021
The Wrath of Kalmaar
S15E5 / 18 Apr 2021
Long Live the King
S15E6 / 18 Apr 2021
Escape from Merlopia
S15E7 / 25 Apr 2021
The Tale of Benthomaar
S15E8 / 25 Apr 2021
The Storm Amulet
S15E9 / 02 May 2021
Riddle of the Sphinx
S15E10 / 02 May 2021
Papergirl
S15E11 / 09 May 2021
Master of the Sea
S15E12 / 09 May 2021
The Calm Before the Storm
S15E13 / 16 May 2021
Assault on Ninjago City
S15E14 / 16 May 2021
Nyad
S15E15 / 23 May 2021
The Turn of the Tide
S15E16 / 23 May 2021
Season 16
Farewell The Sea
S16E1 / 20 May 2022
The Call of Home
S16E2 / 20 May 2022
The Shape of Nya
S16E3 / 20 May 2022
A Mayor Problem
S16E4 / 20 May 2022
Public Enemies 1, 2, 3, 4 and 5!
S16E5 / 20 May 2022
A Painful Promise
S16E6 / 20 May 2022
Ninjago City vs Ninja
S16E7 / 20 May 2022
Kryptarium Prison Blues
S16E8 / 20 May 2022
Hounddog McBrag
S16E9 / 20 May 2022
The Benefit of Grief
S16E10 / 20 May 2022
The Fifth Villain
S16E11 / 20 May 2022
The Council of the Crystal King
S16E12 / 20 May 2022
A Sinister Shadow
S16E13 / 01 Oct 2022
The Spider's Design
S16E14 / 01 Oct 2022
The Fall of the Monastery
S16E15 / 01 Oct 2022
Darkness Within
S16E16 / 01 Oct 2022
The Coming of the King
S16E17 / 01 Oct 2022
Return to Primeval's Eye
S16E18 / 01 Oct 2022
Crystastrophe
S16E19 / 01 Oct 2022
Christofern
S16E20 / 01 Oct 2022
A Lesson in Anger
S16E21 / 01 Oct 2022
Brave But Foolish
S16E22 / 01 Oct 2022
Quittin' Time!
S16E23 / 01 Oct 2022
Return of the Ice Emperor
S16E24 / 01 Oct 2022
Safe Haven
S16E25 / 01 Oct 2022
Compatible
S16E26 / 01 Oct 2022
Distress Calls
S16E27 / 01 Oct 2022
An Issue of Trust
S16E28 / 01 Oct 2022
Dragon Form
S16E29 / 01 Oct 2022
Roots
S16E30 / 01 Oct 2022
Vincent Tong
Kai (voice)
Sam Vincent
Lloyd Garmadon (voice)
Michael Adamthwaite
Jay (voice)
Brent Miller
Zane (voice)
Andrew Francis
Cole (voice)
Kelly Metzger
Nya (voice)
Paul Dobson
Wu (voice)
