The blood trail led out of the room and into the hallway. With half trepidation, half glee I tiptoed over the wide red smear, following it to its source: a crime scene in space. I’d arrived on the set ...

Ridley Scott’s Alien forever changed both science fiction and horror movies when it came out in 1979, and, nearly half a century later, we’re still chilled to the bone by those terrifying xenomorphs.