Kevin is officially done with all the fake BS in 2018 and things get a little darker from there this week as we ring in the New Year with season 4 of the BBC show/Netflix original Black Mirror. What if you knew how long a relationship would last? Will the rich own the right to knowledge? Is defeating death a good thing to do? We told you it gets dark. Black Mirror season 4 comes to Netflix December 29, 2017.