Article continues below advertisementPeacock's latest series Devil in Disguise: John Wayne Gacy stands out as a must-watch after Halloween. This gripping drama portrays the notorious serial killer's horrifying double life and is earning a reputation as one of the scariest shows of 2025.Starring Michael Chernus from Severance, the show offers a harrowing depiction of John Wayne Gacy's existence as both a beloved community figure and a ruthless murderer.