|Tom Skerritt||Captain A.J. Dallas|
|Sigourney Weaver||Warrant Officer Lt. Ellen L. Ripley|
|John Hurt||Engineer G.W. Kane|
|Veronica Cartwright||Navigator J.M. Lambert|
|Harry Dean Stanton||Engineering Technician S.E. Brett|
|Ian Holm||Science Officer Ash|
|Yaphet Kotto||Chief Engineer J.T. Parker|
In deep space, the crew of the commercial starship Nostromo is awakened from their cryo-sleep capsules halfway through their journey home to investigate a distress call from an alien vessel. The terror begins when the crew encounters a nest of eggs inside the alien ship. An organism from inside an egg leaps out and attaches itself to one of the crew, causing him to fall into a coma.