Other than through the characters, the show's good-and-evil theme manifests in the series' contemporary religion, the Christian military order Knights Templar, tarot divination, and in historical events like the Dust Bowl and humankind's first nuclear test. The writers had established a groundwork for story arcs, character biographies and genealogical character links before filming of the seasons began, but many of the intended clues remained unnoticed by viewers. While Ronald D. Moore was confident that "Carnivàle" was one of the most complicated shows on television, Daniel Knauf reassured critics that "Carnivàle" was intended to be a demanding show with a lot of subtext and admitted that "you may not understand everything that goes on but it does make a certain sense". Knauf provided hints about the show's mythological structure to online fandom both during and after the two-season run of "Carnivàle", and left fans a production summary of "Carnivàle" first season two years after cancellation.