Watch the teaser for Netflix's 'Monster: The Ed Gein Story' starring Charlie Hunnam

"I think this is the best season of the three, and I think it’s going to blow people’s socks off," Brennan, who wrote every episode of this season, told Tudum. 

The co-creator continued to express, "Ed Gein’s fairly obscure. It’s this man who lived in a farmhouse and didn’t know very many people, and you’re watching his descent into deep, deep madness and then ultimately into killing people. That seemed like a big ask for a show that has been quite popular. Is that too much to ask of a global audience?"

Alfred Hitchcock, Tobe Hooper, and Jonathan Demme all took inspiration from Gein for 1960's Psycho, 1974's The Texas Chain Saw Massacre, and 1991's The Silence of the Lambs.

"[Gein] is probably one of the most influential people of the 20th century, and yet people don’t know that much about him," Murphy commented. "He influenced some of the biggest serial killers of the 20th century — which is another thing that I think people did not and do not know about him — Ted Bundy, and on and on and on."

The rest of the cast includes Suzanna Son as Adeline Watkins, Tom Hollander as Alfred Hitchcock, Laurie Metcalf as Augusta Gein, Vicky Krieps as Ilse Koch, Olivia Williams as Alma Reville, Joey Pollari as Anthony Perkins, Tyler Jacob Moore as Sheriff Schley, Charlie Hall as Deputy Worden, Will Brill as Tobe Hooper, Mimi Kennedy as Dr. Mildred Newman, Robin Weigert as Enid Watkins, and Lesley Manville as Bernice Worden.

Monster: The Ed Gein Story tells the story of how one simple man in Plainfield, Wisconsin became history's most singular ghoul. He revealed to the world the most horrific truth of all -- that monsters aren't born, they're made...by us.

"I read every book that’s been written on Ed Gein, and I didn’t find many of them very useful, to be honest," Hunnam shared. "I was able to get access to the only known recording of Ed Gein, which was made two days after he was arrested. It’s about an hour-and-10-minute interview with him, while he’s in custody. A lot of the musicality, and his inflection, and his choice of words, and where his energy sat, I was able to extract from it.”

Tune in on October 3.