The nineteenth episode of Thunder Mask.
- Behemoth Battle: Thunder Mask vs. Thinnerman.
- Defeat Equals Explosion: Befalls Thinnerman.
- Make My Monster Grow: Thinnerman is distinct amongst the Devil Beasts in that it only grows after being fed the brains of humans addicted to paint thinner.
- Monster of the Week: Brainwave Devil Beast Thinnerman
