I think the writers don't quite know how to finish. Twas rushed I expect. They have limited time to do the series and can't cram it all in so cut corners! Such a shame as first two episodes were compelling. Such an anti climax for most of viewers I'm sure...
Patsy - you say 'the writers', but there was only one writer, and he directed it as well! So no excuses for a truly pathetic ending. That's 3 hours I'll never get back.