Gaslight (1944)

"I knew from the first moment I saw you that you were dangerous to me."

Patrick Hamilton's Gas Light (also known as Angel Street) remains engrained in Western culture for describing a particularly heinous mental torture. It also inspired two films, of which George Cukor's lavish 1944 version is better-remembered.

Paula Alquist (Ingrid Bergman) is the niece of an opera singer murdered for her jewelry. She marries Gregory Anton (Charles Boyer), a charming musician who isn't what he seems. Soon after their marriage he begins questioning Paula's sanity, blaming ...