Episode one of the series "The Dow Hour Of Great Mysteries" (31 Mar 1960) Kinescope recording of an elaborately staged television version of the often filmed 1922 Avery Hopwood and Mary Roberts Rinehart play "The Bat". Hosted by Joseph N Welch. Starring: Helen Hayes, Jason Robards Jr, Margaret Hamilton. A sinister criminal known as "The Bat" tries to find stolen securities hidden in the rambling mansion owned by the deceased owner of a bank and rented by spinster Cordelia Van Gorder. One of the archetypal "Old House" mysteries.