Late 50's early 60's TV movie
Back in the late 50's or early 60's I watched a "scary" TV movie with my older sister. All I remember about it was there were two frightened nurses alone in a house with a invalid they were caring for and a murder was on the loose. A basement window was found opened and in the end the larger of the two nurses came down the stairs and said "I didn't forget about Sam, Stella". Sam was the grounds keeper and the frightened nurse and killer were together the entire time. What is the name of this movie?
I thought it was Alfred Hitchcock, but I'm not so sure. Please help. My sister constantly tormented me by saying "I didn't forget about Sam Stella!".