Along with vampires Smith has peppered the film with other historical figures who play roles in the story, including Harriet Tubman and Jefferson Davis. (mediamikes.com)
But it would mean that one would understand other historical figures and also contemporary people and ideas basically in Freudian terms and evaluate and respond to them accordingly. (religion-online.org)
It's a procedural that relies on its setting — you can expect other historical figures such as Bram Stoker and Thomas Edison to make appearances — and comic banter between the three main characters to make it attractive to viewers. (metacritic.com)