I wonder which long-running drama series will be next to collapse in the ratings, in the way New Tricks has. My nominations:
3 Silent Witness: This had a ratings wobble in 2012, but with a better slot in 2013 and the retention of two of its three main characters, it survived a bit of PC casting and a shark-jump, to rate well. 2014 saw just one main character remain, but viewers stayed loyal. I just get the feeling this one is going to go pop in the not-too-distant.
2 Lewis: This one faces a tough test on Friday nights this autumn, and with the contrived beginning to the new series, to explain Lewis's return to work, this revival could go either way. Likely to be the last series, though.
1 Doc Martin: Lost a chunk of its audience early in its 2013 series, but stayed consistent after that, despite lots of fan exasperation at the increasingly bizarre scripts. Unless it comes back with a near-perfect first episode, this could be the next big dip.