The venerable “Alien” franchise has nearly 10 films under its belt and, somehow, every time a space crew member’s chest bursts open and a horrifying little creature crawls out we’re still terrified.

Yesterday, FX and Hulu unleashed the long-awaited series, Alien: Earth, with a two-episode streaming premiere. Fans tuned in with nerves tingling. Some probably even looked like poor Kane just before ...