Spirale del terrore was released in the year 1964。Spirale del terrore is also called as Nightmare, Satan mit den langen Wimpern, Meurtre par procuration, Dear: Now Use It, Here's the Knife, Abismo del miedo。

Janet is a young student at a private school; her nights are troubled by horrible dreams in which she sees her mother, who is in fact locked in an insane asylum, haunting her. Expelled because of her persistent nightmares, Janet is sent home where the nightmares continue.