This show is actually a copy of a Swedish series that ran for 2 seasons with a 3rd season coming next year.
http://www.imdb.com/title/tt2180271/From what I've read online, the Swedish series is much better.
American TV doesn't do well at copying foreign show.
Look at The Bridge based on Bron/Broen, another Swedish (and Danish co-production) show.
Diane Kruger is in the American version and yes, she is a good actress but she just doesn't have the niche that made her Swedish counterpart Saga interesting and strange at the same time.
Then there is that show The Returned which is a copy of the French series from 2012 which is also much better.