Alien: Earth has been expanding the franchise lore about mechanical beings, but Alien: Covenant reveals some key history.

At their core, most of the Alien movies are about corporate greed. The lengths a company, mainly Weyland-Yutani, will go to harness and exploit a power from the deepest reaches of space. Whether that means sacrificing a whole ship of employees,

Earth comes from creator Noah Hawley and fits into the world of Ridley Scott's 'Alien' interestingly—here's how.