So far, 4 episodes in, this show has been about grief, loss, and some kind of presence, largely unseen (because it's literally invisible sometimes), that's attacking people. As a strategy to invade an alien civilization, it makes sense: Knock out communication, disable power, broadcast a nonsense word at a frequency only few people can hear to make them (and non-listeners) think they're crazy, etc.
But largely, the pacing just makes me sleepy. There is no sizzle here.