The final episode last night seemed to lose the plot completely - characters behaving totally out of key, the last few minutes as though the script writer ran out of time and decided to kill everyone - very strange and not good at all.

I can't help watching Matthew Kelly and thinking "if it hadn't been for me, he'd have ended up in prison for crimes never committed too".

I agree, it did seem to end rather strangely.
I love Matthew Kelly as an actor, something he has gone on record as saying he would'nt have gone into if he had'nt had the false allegations made against him.
I also recall him being on the Frank Skinner show and pulling Skinner up over jokes he had made during the false accusations. It was a delight to see Skinner squirming as Kelly made him look about as big as a grain of sand.

I wrote to Kelly (who I've never even met) via his lawyer after the entire fiasco was dropped (thanks to me revealing on radio that we'd not met and suffering serious Home Office punishment as a consequence - they don't like false allegations being proven) and asked him to mention in subsequent interviews that there must be hundreds - if not thousands - of falsely accused who were found guilty and served time inside and he's been very good in doing exactly that.