Batman: The Animated Series earns its status as an all-time classic in part because of the sheer variety of tones and genres it touches. Beneath its distinctive film noir version of Gotham City, it explores all kinds of stories, from comedy to romance to gothic horror to science fiction. Yet, they're all still Batman stories, and its universe remains effortlessly cohesive.
Source:https://www.cbr.com/batman-the-animated-series-best-halloween-episodes/