- Directors: James Cameron
- Producers: Gale Anne Hurd, Gordon Carroll, David Giler, Walter Hill
- Writers: Story, James Cameron, David Giler, Walter Hill, Screenplay, James Cameron
- Genres: Action, Horror, Sci-Fi, Thriller
- Actors: Sigourney Weaver, Michael Biehn, Lance Henriksen, Carrie Henn, Paul Reiser
Ellen Ripley (Sigourney Weaver), the only survivor of the space freighter Nostromo, is rescued and revived after drifting for fifty-seven years in hypersleep. At an interview before a panel of executives from her employer, the Weyland-Yutani Corporation, her testimony regarding the Alien is met with extreme skepticism as no physical evidence of the creature survived the destruction of the Nostromo. Ripley loses her space flight license as a result of her “questionable judgment” and learns that LV-426, the planetoid where her crew first encountered the Alien eggs, is now home to a terraforming colony. Ripley is visited by Weyland-Yutani representative Carter Burke (Paul Reiser) and Lieutenant Gorman (William Hope) of the Colonial Marines, who inform her that contact has been lost with the colony on LV-426. The company is dispatching Burke and a unit of marines to investigate, and offers to restore Ripley’s flight status and grant her a commission as a lieutenant if she will accompany them as a consultant. Traumatized by her previous encounter with the Alien, Ripley initially refuses to join, but accepts when she realizes that the mission will allow her to face her fears. Arriving aboard the warship Sulaco she is introduced to the Colonial Marines, including Sergeant Apone (Al Matthews), Corporal Hicks (Michael Biehn), Privates Vasquez (Jenette Goldstein) and Hudson (Bill Paxton), and the android Bishop (Lance Henriksen), towards whom Ripley is initially hostile due to her previous experience with the android Ash aboard the Nostromo.
Ripley and an injured Hicks reach Bishop and the second dropship, but Ripley is unwilling to leave Newt behind. She rescues Newt from the hive in the processing station, where the two encounter the Alien queen and her egg chamber. Ripley destroys most of the eggs, enraging the queen, who escapes by tearing free from her ovipositor. Closely pursued by the queen, Ripley and Newt rendezvous with Bishop and Hicks on the dropship and escape moments before the colony is consumed by the nuclear blast. Back on the Sulaco, Ripley and Bishop’s relief at their narrow escape is interrupted when the Alien queen, stowed away on the dropship’s landing gear, tears Bishop in half. Ripley battles the queen using an exosuit cargo-loader. The two of them tumble into a large airlock, which Ripley then opens, expelling the queen into space. Ripley clambers to safety and she, Newt, Hicks, and Bishop enter hypersleep for the return to Earth.