Trapped series 1 (2015) was amazing. Series 2 looks like it will be just as good. Trapped 2 will have 10 episodes and is filmed in Siglufjordur in Northern Iceland and Reykjavik. It will feature the same police team as season 1. The word on the street is it will be aired in the winter of 2018/9.
You can see the new trailer for series 2 here.