What We Do in the Shadows Season 4 is spoiler for Taika Waititi and Jemaine Clement, who created it. While we can still see some other undead creatures in the present-day Staten Island, we never really get a sense of how this supernatural society exists.
The What We Do In The Shadows series immediately begins building on the foundation established by the film. Perhaps this is most evident when looking at the upgrade in familiar characters. Through Guillermo, we get to see the familiar become a regular part of the main cast's lives, from vampire hunting to saving the ones we know so well about Van Helsing.
Energy vampires are a unique concept introduced in Season 1 that allow them to walk around during the day and live normal lives, although they eat nothing from their blood. Colin Robinson (Mark Proksch), the resident energy vampire, is a standout character.
After the first season of What We Do In The Shadows, the show has continued to expand on its world-building more and more until it has truly become its own particular universe. Plot points that begin as gags quickly turn into established parts of the world. In Season 1, our characters have become the vampire council (after Guillermo had to go vampire slayer mode to save the gang).
What We Do In The Shadows is a constantly changing world that preys on our own prejudiced understanding of supernatural beings but also disrupts its own world-building in surprising ways. Instead, Guillermo is introduced as an almost pitiable familiar who is stuck in the same cycle of being strung along on the promise of vampirism as we saw in the film.
Season 4 introduced us to the first Djinn character (played by Anoop Desai), who, unlike Guillermo, isn't restricted by what we expect him to be. Our Djinn is more like a sloppy accountant who wants Nandor (Kayvan Novak) to settle his books, revealing an inner life that further helps flesh out this strange world.
The ghost possessed by Nadjas appeared to be a gag character, but she's remained active since Season 2. Kristin Schaals "The Guide" seemed to be a cameo character who was there to introduce us to the vampire council, but she's perfectly slipped into the main cast as well. The Baron (Doug Jones) seems to have developed into a permanent part of the show, but eventually become fundamental parts of the world.
What We Do In The Shadows is not a show where things are easy to forget, and despite being a screwball comedy most of the time, it seems to have a great deal of permanence when it comes to introducing new elements. This show's characters and world are constantly changing, and it gives the show a sense of continuity. Despite the fantastical creatures in it, it feels like we learn something new about the characters and the world they inhabit.
What We Do In The Shadows started off as a parody of other vampire films, debunking and mocking what is in fact a rather silly notion. However, through the serialized format, it has been able to develop its own identity outside its origins and truly become its own. In doing so, it has been able to create a unique fantastical modern setting, which includes everything from vampires to gargoyles to the real Jersey Devil, all while maintaining the original narrative.