If we ever come in contact with life out in space, we have plenty of films that have explored every possibility of how that plays out, so we'll be ready. To prepare yourself for some of the best-case and worst-case scenarios, we put together our Power Rankings of the Best Alien Movies.
Title: Galaxy Quest
Release Date: December 25, 1999
Plot: The alumni cast of a space opera television series have to play their roles as the real thing when an alien race needs their help. However, they also have to defend both Earth and the alien race from a reptilian warlord.
Release Date: August 2, 2002
Plot: A family living on a farm finds mysterious crop circles in their fields which suggests something more frightening to come.
Title: The Thing
Release Date: June 25, 1982
Plot: A research team in Antarctica is hunted by a shape-shifting alien that assumes the appearance of its victims.
Title: District 9
Release Date: August 14, 2009
Plot: Violence ensues after an extraterrestrial race forced to live in slum-like conditions on Earth finds a kindred spirit in a government agent exposed to their biotechnology.
Title: Independence Day
Release Date: July 3, 1996
Plot: The aliens are coming and their goal is to invade and destroy Earth. Fighting superior technology, mankind's best weapon is the will to survive.
Title: Men in Black
Release Date: July 2, 1997
Plot: A police officer joins a secret organization that polices and monitors extraterrestrial interactions on Earth.
Release Date: June 12, 1987
Plot: A team of commandos on a mission in a Central American jungle find themselves hunted by an extraterrestrial warrior.
Release Date: July 18, 1986
Plot: Ellen Ripley is rescued by a deep salvage team after being in hypersleep for 57 years. The moon that the Nostromo visited has been colonized, but contact is lost. This time, colonial marines have impressive firepower, but will that be enough?
Title: E.T. the Extra-Terrestrial
Release Date: June 11, 1982
Plot: A troubled child summons the courage to help a friendly alien escape Earth and return to his home world.
Release Date: June 22, 1979
Plot: After a space merchant vessel receives an unknown transmission as a distress call, one of the crew is attacked by a mysterious life form and they soon realize that its life cycle has merely begun.