Warning! This article contains SPOILERS for Alien: Earth season 1, episode 4.Alien: Earth is setting Timothy Olyphant's synthetic, Kirsh, up to repeat a classic Alien franchise tradition, and it could have a huge impact on the show. Kirsh is one of Alien's synthetics, which are basically androids. Synthetics have a long history with Alien - one has appeared in every single Alien movie - but they're a hard group to generalize about.