Devil in Disguise release date, cast, true story and where to watchDevil in Disguise: John Wayne Gacy is an eight-part true crime drama series about one of America's most notorious serial killersView 3 Images Michael Chernus as John Wayne Gacy in Devil in Disguise (Image: ITV/Peacock)A "harrowing and distressing" crime drama exploring the life of one of America's most infamous serial killers arrives on British television screens imminently. Devil in Disguise: John Wayne Gacy is an eight episode series chronicling the chilling tale of the murderer, with Severance actor Michael Chernus in the leading role. The crime drama is rooted in the real-life story of John Wayne Gacy, an American serial killer infamously known as the "killer clown". Someone else agreed: "This is one of the best true crime series that I have ever seen!" Devil in Disguise: John Wayne Gacy airs tonight on ITV at 9pm