The Mother in the film, played by Naomi Grossman, was specifically created by screenwriter Erin Kohut for the film. The mother character does not appear in the graphic novel.
Peter Simeti, the creator of "The Chair" is also the founder and publisher of the creator-owned comics company Alterna Comics. "The Chair" was one of Alterna's first nationally published titles.
Originally, the intention was to film all prison scenes in actual prison locations. However, after numerous scouts the team determined that, for reasons such as sound and camera movement, none of the sites would work. Two weeks before camera rolled the decision was made to construct all but one location on a sound stage.
Susan Eisenberg plays a character named "Ms. Prince". This is a nod to Eisenberg's voice role of DC comic character Wonder Woman in various animated projects. Wonder Woman's alias in comics was Diana Prince.