The series starred Milton the Monster, 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.[3] He was created by mad scientist Professor Montgomery Weirdo and his assistant Count Kook, who lived in a haunted house on Horror Hill.[4] Milton is a smiling, good-natured fellow, thanks to the Professor having used 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."