Yes, even this version of Batman has moments of terror.
Warning: Spoilers are unmarked.
- The opening credits, which are much more violent than what the audience would've expected from a cartoon about the Bright Knight.
- Harvey Dent revealing that even after he'd been cured, the gas effect still lurks within him, and he can still summon his Two-Face appearance at will.
- The climax has Two-Face fly over Gotham, using the evil-extracting gas to turn everyone into Two-Faces. This even applies to a dog and the characters on a drive-thru movie being watched.
- In the climactic battle, Two-Face overrides Harvey Dent's mind so hard that both sides of his face turn bad. For extra points, it manifests as a Painful Transformation, Two-Face boiling through Harvey's skin.