Directed by Ridley Scott, Alien stars Sigourney Weaver in her breakthrough role as Ellen Ripley, alongside Tom Skerritt, Veronica Cartwright and Ian Holm. The film follows the crew of the commercial spaceship Nostromo after they respond to a signal and encounter a deadly extraterrestrial organism. Combining science fiction, horror and claustrophobic creature suspense, the film introduced the Alien franchise and became a defining entry in late 20th-century genre cinema.

Från IMDB:
After investigating a mysterious transmission of unknown origin, the crew of a commercial spacecraft encounters a deadly lifeform.