Title: Alien
Released in: 1979
Genre Horror, Sci-Fi
Cast Sigourney Weaver, Tom Skerritt, John Hurt
Director: Ridley Scott
Plot: After investigating a mysterious transmission of unknown origin, the crew of a commercial spacecraft encounters a deadly lifeform.
Title: Aliens
Released in: 1986
Genre Action, Adventure, Horror
Cast Sigourney Weaver, Michael Biehn, Carrie Henn
Director: James Cameron
Plot: Decades after surviving the Nostromo incident, Ellen Ripley is sent out to re-establish contact with a terraforming colony but finds herself battling the Alien Queen and her offspring.
Alien 3
1992
Sigourney Weaver
David Fincher
Title: Alien: Resurrection
Released in: 1997
Genre Action, Horror, Sci-Fi
Cast Sigourney Weaver, Winona Ryder, Dominique Pinon
Director: Jean-Pierre Jeunet
Plot: Two centuries after her death, a powerful human/alien hybrid clone of Ellen Ripley aids a crew of space pirates in stopping the aliens from reaching Earth.