13 Ghosts

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• William Castle was able to get popular child actor Charles Herbert to play Buck by offering to give him top billing. Charles Herbert would appear in this and two other features in this year before roles in features completely dried up. He would complete his career in television roles.
• Movie Goof (revealing mistake): After Buck slides down the banister and walks off we see money fall to the floor,it's clearly noticeable that the money didn't fall out of the hidden area in the stairs,if you look closely you can tell that it comes from somewhere above the stairs.
• The movie was filmed in "Illusion-O" and a pair of special glasses where needed to see the ghosts. This resulted in a number of sources incorrectly stating that the film was originally shown in 3D. The "ghost viewers" contained a red filter and a blue filter but unlike 3D viewers, both eyes would look through the same color filter. One color would cause the ghostly images to intensify while the other color caused the images to fade.
• Movie Goof (revealing mistake): When the Ouija board planchette is flying around the room (from 21:58 to 22:08), you can see the wires that are holding it up. (This is not apparent in the 2005 DVD version from Sony Home Entertainment.)