In other words, it rips out its victims’ eyes and hotwires their brains, all while they’re alive to scream through the agony. Sexuality isn’t overt but symbolized in “Alien: Earth,” and the rest of the franchise, through the xenomorphs’ unmistakably phallic and vaginal design, reflecting the species’ reproductive overdrive. As “Alien: Earth” skitters toward its season finale, it’s clear that this being intends to do worse than its sheepish gaze lets on. But in the franchise’s ongoing parable of mankind’s hubris, the all-seeing enigma in “Alien: Earth” adds another reason to make us shudder. New episodes of “Alien: Earth” debut Tuesdays on FX and Hulu.