Showed promise .............but. it never really got anywhere but enough intrigued to keep you watching the next episode. The script is a bit of a Miss Marples I'm a spy story. The script for messier as the episode went on! And the last two episodes were a complete mess to a point of laughable! I'll sub it up as promising start, never peaked, plateau in the middle and crumbled into a heap in the end! Did they run out of budget?