He was portrayed by W. Earl Brown.
Keith Summers was partners with Zack Shelby in a sex slave business owned by Jake Abernathy. He had a sister named Maggie. He was the original owner of the motel, which was used as part of a sex trafficking ring he was involved in. The house he resided in next to the motel had been with his family since World War I. He ended up losing the house and motel to the bank, which Norma bought in order to start a new life with her son. This angered Keith, and upon Norma and Norman's arrival harassed them from outside and claimed they wouldn't be able to run the motel.
Later in the evening he broke into the house and handcuffed Norma to a table and proceeded to rape her. He was knocked out by Norman who returned home and they handcuffed him. When Keith taunted Norma with the claim she enjoyed what he had done to her, she angrily stabbed him multiple times with a knife and killed him.
- In the original Psycho continuity (that being the novel, film and film sequels) the Bates family had lived at the house for many years, and the partner of Norma built the motel. However in this series, the house and motel belonged to Keith Summers' family for generations.