The legend of "The Babysitter and the Man Upstairs" is one of the most widely circulated, well known urban legends in modern history. This week we ask why this story has such staying power and how it relates to real, documented crimes. We will examine everything from the 1950s Columbia, Missouri murder of a babysitter that may have inspired the legend, to a story of a Washington family being stalked and harassed using their own cell phones within the last decade. We also explore the kinds of calls that have come from killers throughout history, and what they say about the murderers who make them. We hope you will join us for a truly creepy episode, and that you've checked the children...