Love some of these theories.
I think the car thing, de-clutching etc could be to show Alison really knows her stuff and a friendship will build as she helps Catherine do up the truck.
One thing that struck me as odd, was twice last night Ryan told Catherine he loved her, she didn't say it back, now I know she really does. But also the thing about what will I do when you go off to the Himalaya's? She didn't really reassure him he will still be 16, she's all he's got. It felt very cold. But I've not watched back to see it this was how she always was with him. Maybe she just knows he's so damaged she will always lose him?
I do think Claire and Neil are both being blackmailed, but Claire surprised me as when she got the texts she looked genuinely baffled rather than worried which could just be SF's acting but didn't really fit with Claire either.
Anne getting into CID is significant but I don't know how yet.
The window I think was to highlight the dodgy dealings with the council etc and to get the ex involved for his article, I fear he will meet a sticky ending, I think if you've watched the missing you naturally think he's dodgy, but don't think he is.
I wish they'd drop them all on iplayer it's torture waiting