How can Nick be involved in the killing of Tim if he was trying to grill his wife about where she was on the night of the 17th when it happened?
I don't think he is involved but is into something else (sex ring? or just something like being an adulterer?), which is why he doesn't want to admit that he was also not home on that night.
And Kate gets a call from Steve re KRG30, immediately goes to forensics and Roz and Jodie don't wonder where that came from?
Why would she randomly question that? They do wonder. They have a conversation about it, just before Roz butters her up by suggesting a drink to talk about her career prospects.
Roz's boss is dodgy I think this is the key to the whole thing. They have history and he's got something on her.
I'm struggling with the Hana/Tim timeline too.
I'm sure she didn't know him when he went to the cafe, and they talk about 'cleaning' (possibly a euphemism for 'sex services') as if for the first time ie he hasn't yet been to her flat. I don't know when he could have been and left his DNA in her bed.
Who left Roz the Post-it saying 'someone is watching you'? Is it Buckles? If so, he's on very thin ice defying Ted.