Just found "
fortitude" (IMDB Link) on Amazon Video. I thought it might be an Amazon production, but I don't think so, not sure who put it out, but it's definitely not American broadcast. It's British in origin. But I digress... (EDIT: Season 2 at least seems to be an Amazon original)
This show is great. I can't tell if it's a Crime Drama, Horror, or Sci-fi, but all of them in one. Right off the bat there is an element of Horror and sci-fi, but then that gets back burnered up until the end of the first season (Where I'm at now). The story telling is amazing, as they skip over key parts, leaving the mystery of what happened hanging in the air as they try to figure it out. And when it does get revealed, they do so for the most dramatic effect they can get. And as they figure out the various mysteries of the plot, you go "Oh good, that's sorted then. Oh wait, what about X!?". There's all these little things they add, then make you forget about, just to bring them back later. It's amazing story telling.
Stanley Tucci, Micheal Gambon, and Dennis Quaid (season 2) all play important characters, yet they don't even get top billing. This is a great show.