I gave the first series 7

The second series has terrible script & overpowering music score. Set/CGI are good, but that doesn't save it. Shame it went downhill. The actors must have been questioning their lines every episode.

Th story-line makes no sense , they saved the worst for last , the finale was confused nonsense.

I wonder why they have no drones in the future. Would have gotten them out of quite a few predicaments.