In order to get the voice of serial killer Ed Gein just right for the third season of Netflix's Monster, Charlie Hunnam went down a dark rabbit hole that led him to a rare recording that even Netflix couldn't find. According to Hunnam, he reached out to Joshua Kunau, producer of the documentary "Psycho: The Lost Tapes of Ed Gein." Monster: The Ed Gein Story is the third season of Ryan Murphy's true crime Monster series, with the first two following Jeffrey Dahmer and the Menendez Brothers. Monster: The Ed Gein Story lands on Netflix on October 3. For more, check out our list of the best Netflix shows, or keep up to date with upcoming TV shows.