Charles Herbert, Jo Morrow, Martin Milner, Rosemary DeCamp, Donald Woods, Margaret Hamilton, John van Dreelen
A dozen ghosts need another member to round out their ranks. They have four likely candidates to choose from when a family moves into the house inhabited by the ghoulish group. Originally viewed with "Illusion-O," a technology much like 3-D, which allowed the viewing of the ghosts only through a special pair of glasses.