When the reclusive Dr. Zorba (Donald Woods) dies, his nephew inherits his house. When the younger Zorba moves in, however, he discovers a posse of spooks! Legendary showman William Castle filmed the story in Illusion-O, a color filter effect that made the ghosts invisible to all but those who wore special glasses. The video -- which includes an introduction by Castle -- preserves this gimmick (plus offers a black-and-white version).