A 1976 BlackComedy thriller directed by Creator/AlfredHitchcock. It was his last film. The main cast included Barbara Harris, Creator/BruceDern, Karen Black, and William Devane.

The film starts with a SpookySeance contacted by Blanche Tyler (Harris). Her latest client is elderly Julia Rainbird (Cathleen Nesbitt), who wants to locate her last living relative: the illegitimate son of her sister, given up for adoption decades ago. Now that boy is supposed to inherit the family fortune, and Julia offers Blanche $10,000 to find her heir. Blanche is actually a PhonyPsychic. The facts she reports to her clients are the results of some detective work by her boyfriend, George Lumley (Dern), an unemployed actor and part-time cab driver. The two bumbling detectives now have proper motivation to find that heir.

The scene shift to the heir Arthur Adamson (Devane) and his girlfriend Fran (Black). They are both WickedCultured. Arthur murdered his foster parents many years before and now works as a jeweler and upper-class house. He and Fran actually earn most of their money from a highly-successful career as kidnappers, their targets being millionaires and dignitaries. By the time the film starts, the thrill of the work has become part of their motivation. Danger turns them on and really helps their sexual activities. These two are dangerous people.

Naturally, seeking out the two master criminals turns out to be a more dangerous mission than Blanche and George expected.
!!This film provides examples of:

* AsideGlance: Blanche winks at the viewers as the movie ends.
* TheCameo: Alfred Hitchcock makes an appearance in silhouette behind the door marked [[HarsherInHindsight Register of Births and Deaths.]]
* CityWithNoName: Unlike most Hitchcock films which feature an iconic city or landmark, ''Family Plot'' was filmed in San Francisco, but all references to the city's name were removed from the script.
* EvenEvilHasStandards: While Fran readily goes along with Arthur's kidnapping schemes, [[spoiler: she's reluctant to murder Blanche, as Arthur intends to. She doesn't even want to drug Blanche at first]].
* GettingCrapPastTheRadar: The dialogue is loaded with DoubleEntendre.
* HiddenInPlainSight: Arthur hides the diamonds from his kidnappings (the diamonds are the ransom payment) in [[spoiler: the chandelier in the hallway of his house. Blanche is the one who discovers this at the end]].
* LeaningOnTheFourthWall: Rare for a Hitchcock film. In the final frame Blanche winks at the audience.
* PhonyPsychic: Blanche Tyler. Possibly subverted in the very last scene.
* VehicularSabotage: The brakes on George's car are tampered with, sending he and Blanche hysterically careening down a winding mountain road.
* VillainWithGoodPublicity: Arthur Adamson is a respected jeweler, but behind the scenes he's a successful kidnapper and jewel thief.