From superhero deconstruction to existential horror, these animated series push the boundaries of the medium, tackling themes ...

Batman: The Animated Seriescould get surprisingly dark for a Saturday morning cartoon for kids, with plenty of episodes that pushed the limits of what "family-friendly" animation could get away with.

From a starting list that was admittedly alarmingly long, we managed to winnow down our 20 favorites—including animation, sci-fi, horror ... more Black Mirror stories should be continued.