When I posted earlier today I hadn't realised how long this thread had become and thought I was posting a closing note to a mistake in opening this thread to begin with. But as others have said, comments have made it much more interesting.
Hammny Grandma was the mother in some series about a woman who had taken over her husbands legal practice and two of her daughters were part of it but conspiring against her. And a third daughter was flighty and arty. She looked and sounded exactly the same in that.
I think Daniel's dad was just a bad dad obsessed with his architecture - or trying to cope with wife's suicide.
The big clue was meant to be the seafood allegy I think that alerted Jodie before she got the text about no match.
The real killer, the career obsessed brother faked the other test by bribing someone, as he did to get the unlikely visit between Jodie and Daniel's real dad. (Were we supposed to think the Detective had a soft spot for Jodie? Turing up her flat and gazing at her with sad eyes?)
I thought both the baddies and the gardening crew were terrible character cliches that give tv a bad name.
ie violent east europeans carrying out dodgy deals and forgeries exploiting alienated youths and opening operating out of a squat that the local police musth have known about. The gardening business was some awful token compensation towards having another drama about a white middle class family. So suddenly out of nowhere a primarily BAME organisation is working in leafly suburbs and giving Jodie a sort of street cred along with her (arty?) outfits. But useful to let her easilly find people with dodgy backgrounds who would make up fake DBS (she was using a false name), passports etc..
But I thought the scene with the chain saw was brilliant! However big and burly you are you are not going to stick your arm out anywhere near a whirling chain!
But as i said above, it seemed more like it was put together by someone watching other tv crime shows than anyone who had any knowledge or done any research. A bit like that children's game where you start a whisper at one end of a chain of people and see how it comes out at the other end!
I think there have been some good dramas on C5. Like the first series of Blood. The second series was nothing like as good and apparently there wont be another.