The Haunted House of Horror
Teenagers gathered in an old mansion are being murdered one by one. The survivors must discover who among them is the killer before he finishes off everybody.
- Genre: Horror, Thriller
- Studio: Tigon British Film Productions, American International Pictures, Tigon
- Keyword: haunted house, swinging london
- Cast: Frankie Avalon, Jill Haworth, Dennis Price, Mark Wynter, George Sewell, Gina Warwick