Devil in Disguise: John Wayne Gacy is inspired by the 2021 Peacock docuseries from NBC News of the same name. The streamer says the scripted foray “peels back the twisted layers of John Wayne Gacy’s life while weaving in the heartrending stories of his mostly gay victims; exploring the grief, guilt, and trauma of their families and friends; and exposing the systemic failures, missed opportunities and societal prejudices that fueled his reign of terror.”