The membrane separating movies from TV has never been thinner, as one of Hollywood's biggest franchises suddenly has more prosects on the small screen than the cinema. FX has renewed Alien: Earth for a second season, which will begin filming later this year.

What if you found out that you had a long-lost relative? And what if that long-lost relative was from a different planet in our galaxy? And what if this faraway planet was home to billions of humans, just like Earth? But these “humans” don’t look ...