Milton the Monster is a Frankenstein-looking monster with a flat-topped, seemingly hollow head which emitted various quantities of white steam or smoke based on his mood or situation. He was created by mad scientist Professor Montgomery Weirdo and his assistant Count Kook, who lived in a haunted house on Horror Hill. Milton is a smiling, good-natured fellow, thanks to the Professor using too much "tincture of tenderness" as explained in the opening theme of each individual Milton the Monster segment. Milton was created not of individual body parts, but rather in a mold from such liquids as "essence of terror" and "sinister sauce." Out of fear of his creation destroying him, Professor Weirdo intended to add just a few drops of the aforementioned tincture of tenderness to the mold, but Count Kook bumped the Professor's elbow, resulting in too much of the tincture being added to the mix.