The Halloween Episode is a rarity among rarities, a riddle wrapped in an enigma, wrapped in wax paper. In episodic shows, the passage of time is generally ignored - it draws too much attention to the artificiality of the premise and questions how the world of the setting syncs chronologically with the world of the audience. On top of that, when holiday episodes do come along, they generally have certain expectations of tone and theme - particularly when it comes to Christmas. Halloween episodes, though, are something different: the only real expectation is that they’re going to break from the normal “reality” of the show. They don’t necessarily have to be scary (or even have the trappings of scary things), but they do have to be weird. In some cases, particularly with more serialized shows, this shift allows for a new perspective in the ongoing story, a different way of seeing the narrative that will put past and future events in a new context. My favorite example of this would be Mill...