Alien: Earth The Fly Season 1 Episode 6 Editor’s Rating 4 stars * * * * « Previous Next « Previous Episode Next Episode » The show hits the “are the hybrids human?” theme extra-hard this week. Photo: Patrick Brown/FX What makes a being sentient ? It’s an incredibly tricky question, one that has vexed philosophers (and science-fiction writers) for generations. And before Alien: Earth , it’s a question raised mainly just in passing in the Alien movies. There’s some idle speculation in the films