Warning! This article contains SPOILERS for Alien: Earth season 1, episode 4.One of the monsters in Alien: Earth feels like a callback to one of Kurt Russell's most iconic horror movies ever. Each of Alien: Earth's five new alien lifeforms is unique. One is a mosquito-like organism that drains its host of blood, one is a plant-like pod that grows on the ceiling, one is a squid-like creature that hijacks its victims eye sockets, and one is the iconic Alien monster, the Xenomorph.