I can't count how many times that question is asked or implied and the answer is always, "yes," usually with an indignant pose, how could you ask me that? The answer is never the truth and we viewers know it. It's maddening, not satisfying, to be ahead of the characters so often. It's a screenwriting twist we too soon get tired of.
The main characters have flaws and make poor choices that make them not more human, but foolish and aggravating. We don't always know what's going to happen but we are certain it won't be good. The plot and evidence are overtaken by cinematography, which is good but misplaced and distracting. This should be more procedural for my taste, but gets into the weeds of "everybody's got a secret," just waiting to surprise you.
DI Hardy is such a disagreeable person, it's difficult to believe anyone collaborates with him. If I wanted to watch a police detective berate subordinates, go charging in strange directions on strained evidence and intuition, and recognize clues that other trained personnel have overlooked, I would watch reruns of "Vera." This series better get better soon or I'm outta here.