During its return to the earth, commercial spaceship Nostromo intercepts a distress signal from a distant planet. When a three-member team of the crew discovers a chamber containing thousands of eggs on the planet, a creature inside one of the eggs attacks an explorer. The entire crew is unaware of the impending nightmare set to descend upon them when the alien parasite planted inside its unfortunate host is birthed.

A modern classic, Alien blends science fiction, horror and bleak poetry into a seamless whole.

'Alien' is celebrated for its groundbreaking effects, iconic creature design, and atmospheric tension. The film's suspense, realistic interactions, and minimalist horror approach are frequently praised. Sigourney Weaver's performance as Ripley and the film's genre influence are often commended. The production design, eerie soundtrack, and practical effects are noted for their impact. Despite some pacing and character development criticisms, 'Alien' is regarded as a seminal sci-fi work.