Alien

Alien is a science fiction horror franchise which has spawned several movies (including crossovers with Predator) and numerous other media such as comic books, graphic novels, books and video games. The franchise tells the stories of humanity's encounters with an insectoid extraterrestrial species generally referred to as "Aliens", or sometimes as "Xenomorphs".

The Aliens' characteristics include having acid for blood, being generally hostile, having a social order which resembles that of ants or termites, and reproducing by implanting their embryos into unwilling hosts (often hapless humans). When the embryos mature into larvae, they violently burst out of the host's body, killing the host.

The first film of the franchise was promoted under the tagline "In space no one can hear you scream", which quickly became a pop-culture catchphrase and one of the most recognizable movie slogans of all time.

The Alien franchise and creatures have been referred to several times in the Simpsons universe, both in television episodes and comic stories.