Only one horror film has ever terrorised me so completely that I didn’t sleep at all the night after watching it. It’s at number 37 on the top 50 below, which is an attempt to sort almost 130 years of the form – from Henri-Georges Clouzot’s Diabolique, released in 1955, to this year’s freaky box office smash-hit Backrooms – into an objective pulse-quickening pantheon.
The 50 greatest horror films of all time
