Synopsis by Hal Erickson
This episode is based on a famous urban legend, previously filmed as the 1949 theatrical feature. Patricia Hitchcock (daughter of the boss) stars as Diana Winthrop, who attends the 1899 Paris World's Exposition in the company of her mother (Mary Forbes). Having left their hotel room to fetch some medicine for her ailing mother, Diana returns a few hours later, only to be told that she has not been registered. Further investigation reveals that no one can remember ever seeing Diana or her mother -- and there is serious doubt that her mother ever existed! The key to the mystery is a patch of wallpaper...and the solution involves an elaborate ruse to save the Exposition from being closed down before it has a chance to open.