Alien(1979) -

Back on the Nostromo , Ripley attempts to enforce a 24-hour quarantine to prevent the creature from coming aboard. However, Ash violates protocol and opens the airlock, allowing the team and the specimen inside.

is snatched while searching for the ship's cat, Jonesy. Alien(1979)

Deep in space, the commercial towing vessel Nostromo is carrying 20 million tons of mineral ore back to Earth. The seven-member crew—Captain Dallas, XO Kane, Warrant Officer Ripley, Navigator Lambert, Science Officer Ash, and Engineers Parker and Brett—are awakened early from cryosleep by "Mother," the ship's AI. Back on the Nostromo , Ripley attempts to