Overview
Terror is a 1978 British supernatural horror slasher film written by David McGillivray and directed by Norman J. Warren. It stars John Nolan and Carolyn Courage as two cousins who fall victim to a curse that a witch placed on their ancestors.
Conceived as a "fun horror film" with a simple premise, Terror was shot in various locations around London and Surrey. Although it was a box office success in the United Kingdom, it has drawn a mixed critical response for its storytelling and visual style, both of which were inspired by the Italian giallo horror film Suspiria (1977). Warren's plans for a sequel remain unrealised.
Plot
Three hundred years ago, the witch Mad Dolly is captured on the orders of Lord Garrick. She is about to be burned at the stake when she invokes the Devil, causing one of her executioners to catch fire. Garrick rushes back to his house, where a disembodied arm bursts through a wall and strangles him. Lady Garrick is confronted by a sword-wielding Mad Dolly, who beheads her and curses the family's descendants.
Credits roll, revealing that these scenes form the ending of a horror film directed by James Garrick – the last of the Garrick line with his cousin Ann. James is hosting a preview screening for Ann, an aspiring actress, and their friends at the largely unchanged Garrick house, which he now owns. He believes his film to be based on true events and has also inherited Mad Dolly's sword.
From Wikipedia (CC BY-SA 4.0).