The official logline of "Alien: Earth" states, "When a mysterious space vessel crash-lands on Earth, a young woman (Sydney Chandler) and a ragtag group of tactical soldiers make a fateful discovery that puts them face-to-face with the planet's greatest threat. "

FX’s teaser was a tie-in with Earth Day, which is a real event intended to raise awareness about the environment. It landed on April 22, and is of course prime fodder for both the mildly apocalyptic state we find ourselves in at the moment, and for the premise of Alien: Earth.