EDIT: In the middle of Season 2. My interest has rapidly declined, a lot of the novelty and mystery is gone, and it's definitely difficult to keep up with plot points, or remain interested enough in them to follow along. Now that I'm jaded to all the little things that made the show cool and unique, it feels a lot more like just watching a team go through another day at the office each episode. There's a lot of unprecise dialogue, which I found to be a benefit in the first season, but because the underlying plot is often relatively uninteresting in the 2nd, it's harder to find the motivation to follow along with the character's conversations. I, too, feel dumb and lost now. And the show feels a bit more weak.
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It is SOOO hard to find good acting on Netflix. Like nauseatingly difficult. Finally I found a show that has it. Not only that, but this show also has great writing and production, to boot. I love scifi shows like these. X-Files, the 4400, this show....I can't get enough. Like others mentioned, I love that it is respectful of your intelligence and doesn't turn your brain numb by explaining concepts to the viewer as if you're a child.
The only things I can't stand is how slow-moving the soldiers were to turn the key at the end of S1E6, when the travelers surely knew they were going to get shot if they didn't move fast enough (not that it ends up mattering, and it all was part of the plan anyway), and Trevor's raspy voice :( (which obviously makes me look bad to say) AND CRYING BABIES!!!!!!