Every week there's been a different slant on who may be guilty.....Talk about a rollercoaster....
Still believe that Hastings is a decent chap who has a notion of what is 'the right thing to do' and is essentially 'honest' (but maybe that's a double bluff too....)
It could well be that it was no coincidence that Denton picked out Carly's disappearance to investigate.....Maybe it's a fait accompli that anyone being investigated is put on 'missing persons' duty - she could have stage-manoevred the whole thing....
I think, though, that there's a different twixt 'covering your back' and digging for dirt on fellow officers and stage manoevring such an cunningly audacious revenge plot....
Her looking smug at the end didn't necessarily indicate she'd been involved in setting him up - but just maybe her being pleased he'd been 'rumbled'
HMMMMMM - hoping in a way that the ending is ambiguous...sure there will be another series....