Alien (1979)
Directed by Ridley Scott

WILLIAM FRIEDKIN SAYS: ''Alien was a big surprise to me. Usually a film that's set in the future doesn't contain very much horror, 'cause you know it's all fantasy. But Ridley Scott built the suspense so incredibly that when you finally got glimpses of the alien, and realized how it came to be, it was shocking. It never let up. I would say the two most frightening moments in cinema are the murder of the Janet Leigh character in Psycho, and the chest-bursting scene in Alien.''