The Thriller, shot in black and white, was directed by Joseph H. Lewis. Lugosi plays Kessler, a man controlled by homicidal impulses beyond his control. He is being controlled by his wife, who had left him for another man. She was involved in a car accident that has left her brain damaged and is kept in the basement, in secret, by Kessler's gardener. When an innocent man is executed for a murder done by Kessler in the house, his twin brother visits and tries to unravel the mystery.