Marston, often erroneously thought to the the inventor of the polygraph, better known as the lie-detector, was actually the inventor of the systolic blood pressure cuff, an important component of the polygraph. The invention of the polygraph is more appropriately credited to John Augustus Larson.
Though promoted as "the true story" of William Moulton Marston, Elizabeth Marston and Olive Byrne, most of this film is speculative as the Marstons' lived their lives in privacy. At the 2017 New York Comic Con, Angela Robinson was asked by Travis Langley, a friend of the Marston family, and said that she "talked to a source who said that that was her interpretation, who had studied them. chose to tell the story as my interpretation of the story, and I think that there's a lot of facts that are indisputable about the Marstons and I feel that there's a lot that's open to interpretation. So as a filmmaker, this was my interpretation of their story."
According to director Angela Robinson at the 2017 New York Comic Con, the producers tried to invite William Marston's granddaughter Chrissie Marston to a private screening of the film. Chrissie, however, publicly stated that they did not try a direct contact, just "via other parties".