During many of the early episodes of “Alien: Earth,” David Rysdahl hovered in the background of scenes, concentrating on his job as lead technician for the Prodigy program.

In space, no one can hear you scream, but they can sure hear you scratching your head as you try to make sense of the sprawling “Alien” universe. While Ridley Scott’s 1979 haunted-house-in-the-cosmos ...

There was a method to David Rysdahl's scientific moves as Arthur in "Alien: Earth." The actor talked with technicians who could guide him playing a behind-the-scenes operator. David Rysdahl and Essie ...