Airdate: August 18, 2018
The Sons of Garmadon raid the Resistance's hideout. In the Realm of Oni and Dragons, the Ninja find an ally in Heavy Metal.
- Fast-Roping: Some of the Sons of Garmadon enter the garbage depot this way.
- Meaningful Name: Heavy Metal introduces herself as Faith, just after Wu had a dream of his father telling him to "Have Faith."
- Samus Is a Girl: Heavy Metal keeps her gender secret, not by choice, but because Iron Baron forces her to.
- Voluntary Shapeshifting: Mystake is revealed to be an Oni when she exhibits this trait, escaping from the Sons of Garmadon by turning herself into a rat.
