According to the show's executive producer David Kemper, the idea for Harvey came from a necessity to have the character of Scorpius more visible during the show. As the show's main villain, he needed to be a constant and viable threat. After seeing a hallucinated Scorpius interact with Crichton in the second season's fourth episode, "Crackers Don't Matter", they came up with the idea of putting Scorpius inside of John's head. The clone's presence was hinted at in the second and third episodes of the "Look at the Princess" trilogy as well as in "Beware of Dog" before his presence was revealed outright to Crichton in the season's 15th episode, "Won't Get Fooled Again". However, this then became an example of dramatic irony, as Crichton's memory of Harvey was erased, until he was revealed again.