It is true that the series has been put on hold after three (of a planned 8) episodes.
I understand that Five was disappointed with the ratings, which might suggest that people like me who think the series is rather good are in the minority.
But I think it's more likely that they've got it wrongly scheduled. On Monday 19 Jan, for instance, it was up against Hunter (final instalment) on BBC1, Unforgiven (2 of 3) on ITV1 and Big Chef Takes on Little Chef (1st of series) on Channel 4.
I think they'll bring it back in the summer, and I hope it'll get better scheduling.
Incidentally, I gather Five's not very good at telling people who might have liked to know it was being pulled - people like the production company Granada, and the Air Force. I would imagine they're not best pleased.
airsound