Alien (1979), Rating: 9/10, IMDB link
When a mining ship lands on a planet to investigate upon a suspected SOS, the entire crew are unaware of the terror which they would unleash upon their ship. When a alien life-form attach's itself to the face of a crew member, the rest of the team act fast to try and separate the two organisms. Unbeknownst to everyone, this is the start of the terror which would affect every member of the seven person crew.
