This episode was first broadcast in 1965 on the Alfred Hitchcock Hour. I watched it with my grandmother, and it scared the bejesus out of us! It's called "the Unlocked Window". Apparently the house from "Psycho" is used as the nursing home. There was a remake of this episode in the eighties with Annette O'Toole playing the part of nurse Stella. A nurse is murdered in the first scene. As I remember, she was dragged from the sidewalk into some hedges. The suspense is consistent throughout the story, with ominous radio reports of a killer on the loose, and a violent thunderstorm that has the resident nurses, Stella and Betty (nurse Ames) quite on edge. Killer ending!