I am only halfway through EP1 - but I am going to go with some sort of ancient virus that has thawed from one of their ice cores/samples caused them to go crazy, and flee into to darkness, where they end up dead from hypothermia.
Either that, or aliens.
If it's aliens then what the hell are True Detectives going to do? This series is about solving hideous crimes and justice. Gonna go out and arrest an alien?
Yeah, I hope it isn't aliens or something supernatural.
My wife decided to watch season 4 with me and she hasn't seen the earlier seasons. We finished the episode and she was kind of annoyed with me that I said it's a well-done mystery show (kind of like Mare from Eastown, which she liked, with pacing like Fargo, which she also liked) and instead we're getting aliens or some ancient monster.
Unless, of course, it's a monster Daddario or an alien Daddario.