I am not sure if it was Suspense series that had this episode but it was called “Sorry, Wrong Number” and it starred Agnes Moorehead. Wonderful episode and very disturbing as well! She was a great actress anyway, especially in the Bogart movie Dark Passage.

An interesting side note: in Dark Passage her name was Mage Raff. In the early 90′s cult movie “A Gun, A Car, A Blonde”, the sleazy slimy sister with black hair was named Mage as a tribute to that movie.