Image Credit: FX Alien: Earth is taking us back in time before the events of the original 1979 horror movie Alien, which starred Sigourney Weaver, Tom Skerritt and Veronica Cartwright. With a brand-new cast, timeline of events and storyline to unfold, new fans are wondering what time they can catch new episodes of the FX series. As TV and movie fans already know, this era of prequels and sequels has become the norm, and some aren't surprised that Alien: Earth offers a glimpse into the backdrop of Alien - one of the most successful sci-fi film franchises in Hollywood history.