Yes one of my two questions was what happened to whoever was bedridden in the home of the ex constable, who was found drowned.
I dont think he was pushed in by the ex army character, but the serial killer who probably did it thinking it would please his boss.
But re why the victims, I think it was linked to his bad relationship with his step father, and anyone he thought was trash was fair game.
The twin was the bearded corpse who it turned out had a twin sister he spent every christmas, but always went back on the road (I wonder if in fact the picture of the two of them together was real, and because of the unmistakably beard they just needed a corpse with a beard).
I know I had a second question but have forgotten.
Overall I thought it was much better, but nearly vomited as the prospect of Nikki marrying Jack. He is just such a boring man, and quite honestly looks gross. And she just looks totally uninterested.
Emily Fox has been in lots of different tv series over the years, but I think is now so identified with Silent Witness she probably doesn't get many offers. So maybe this is why she set up the Italian detective series, apart from the wonderful setting, and lots of attention from hunky Italian men. (Her character had an interesting relationship with her onscreen sister played by Tara Fitzgerald) And in that series as in Silent Witness, she also had an endless number of strange fashion get ups, hopeless inappropriate for someone who was a sort of amateur James Bond. https://uktvplay.co.uk/shows/signora-volpe/watch-online
As far as I remember Harry didn't die, but went for some prestige job in the US as he felt he would never get any advancement in the UK. It was never clear to me that they actually had a relationship. But those of us hoping for his return are going to have to get rid of Jack. Couldn't he do something stupidly manly and die a heros death. Then Harry could turn up from the Congo or wherever he is and hold her hand.
I think maybe that was my second question. How to write Jack out of the series!