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A 1978 British-American horror film directed by Richard Marquand (''[[Film/ReturnOfTheJedi Star Wars: Return of the Jedi]]'') and starring Creator/KatharineRoss and Creator/SamElliott.

Maggie Walsh (Ross) and her boyfriend Pete Danner (Elliott) are American architects who travel to England after being contracted for a job there. Shortly after their arrival, they are riding in the countryside when their motorcycle hits the limousine of one Jason Mountolive (John Standing). He invites the couple to his mansion for the duration of their ride's repairs. Staying there, it quickly becomes apparent that their encounter was no coincidence, as odd, deadly accidents start befalling Mountolive's other arriving guests.

Roger Daltrey, lead singer for Music/TheWho, appears in the supporting cast as does Creator/CharlesGray.

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!!This film has the examples of:
* DisturbedDoves: Doves scared by Jacques almost give away his position on the roof to Pete before he starts shooting.
* FailureIsTheOnlyOption: When Maggie and Pete try to leave the mansion forcibly in a stolen car, they find themselves GoingInCircles, no matter what road they take.
* {{Fainting}}: When Maggie sees Mountolive's true old and withered form, she faints on the spot.
* HollywoodSatanism: Of "rich people who gain power and wealth from forces of darkness" variety.
* InstantDramaJustAddTracheotomy: When Clive starts choking in the middle of a dinner, Nurse Adams tries to save his live with a tracheotomy. She was was very unlikely to succeed, since the bone Clive's throat didn't get there by normal means.
* IronicDeath: Most of the deaths of the supposed inheritors are [[KarmicDeath related to the scandals]] they have been involved in.
* ManOnFire: A sudden burst of flames from a fireplace engulf Karl, and he is burnt to the bone after flailing around in agony.
* MarkOfTheSupernatural: The strange white cat in the mansion has differently colored eyes, [[spoiler:which is a first hint that it is actually [[VoluntaryShapeshifting a shapeshifter]]]].
* {{Novelization}}: Written by John Coyne. It was briefly a bestseller and was generally received better than the movie.[[labelnote:source]]''Discovering Modern Horror Fiction'' by Darrell Schweitzer.[[/labelnote]]
* ReallySevenHundredYearsOld: Jason Mountolive is actually about 300 years old, and uses his powers to make himself appear younger when needed to.
* {{Reincarnation}}: [[spoiler:Maggie is a reincarnation of Margaret Walshingham, a powerful witch from the 16th century ([[BurnTheWitch who was burned as such]]), who is the mother of Jason Mountolive]].
* TheReveal: [[spoiler:Jason Mountolive himself has been killing his inheritors as a form of sacrifice so that all of his powers will be transferred to Maggie]].
* VanityLicensePlate: Downplayed with Jason Mountolive's car, which has the license plate that reads "JM 1".
* VoluntaryShapeshifting: [[spoiler:The white cat that moves about in the mansion is actually Nurse Adams in animal form]].

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