What does an infamous Wisconsin grave robber from the 1950s have to do with the classic horror film Psycho? Quite a bit. The gripping new docuseries Psycho: The Lost Tapes of Ed Gein, which premieres on MGM+/Roar on September 17, illuminates the story of Edward Theodore Gein, a notorious killer and grave robber from the small village of Plainfield, Wisconsin. This is one of the most compelling docuseries of the year.