Endless Night (1972 Sidney Gilliat & scr)

Agatha Christie's crafty later (1967) novel, adapted by Gilliat, given early seventies accoutrements (Moog, sex, zoom lens, flash editing). Gruff Hywel Bennett romances American heiress Hayley Mills to death. With Britt Ekland, George Sanders (a year away from suicide brought on by failing health), Per Oscarsson, Peter Bowles, Aubrey Richards (doctor), Lois Maxwell. That is clearly not Hayls singing the theme song.

The Isle of Wight, apparently

The house - with its one way glass and hidden swimming pool - is far out (Wilfred Shingleton). Shot by Harry Waxman and scored in the familiar doomed love theme style of Bernard Herrmann. The giant eye at the end is risible.