I'll start with the positives, the acting was good, and it was nice at least to see The BBC making sci fi, in a time when it has been sadly shoved to the back of the queue.
Unfortunately, it's a pretty poor attempt, earlier in the year I thought this was going to be a big Christmas drama, big budget, exciting, featuring Eleanor Tomlinson and Rafe Spall, I'm glad they didn't transmit this at Christmas, it would have been an even bigger disappointment. Spall and Tomlinson were wasted, they're great, but were up against it with the script.
What should have been dynamic and exciting was slow and dull, not helped by the clunky jumps forward in time.
Sometimes tinkering works, sometimes it doesn't, I fear here there was too much tinkering. Simply put this was poor, with the last episode proving a real challenge to get through. 4/10