How Alien: Covenant fits in the larger Alien timeline, and what comes next

The latest installment of Ridley Scott's space-horror franchise, Alien: Covenant, hits theaters today. The series is coming up on its 40th anniversary, and over the course of its lifetime, it's taken some interesting turns -- and some downright unfortunate ones. The franchise is already in a strange place, with the latest films sitting somewhere between prequels and sequels. And as with any long-running franchise, numerous entries can led to a complicated timeline. With the latest film coming ou...