Definitely agree with others regarding "chis" and the amount of unnecessary acronyms!
Also recognised Terry Boyle as soon as he took his hood down in the back of the police car. I know he's an actor but I genuinely found it quite sad to watch him being interviewed knowing vulnerable people like him are targets for cuckooing.
Farida obviously has some deep rooted issues with jealousy and paranoia but I don't think the locks on Jo's doors are to protect her from Farida.
So interesting to read everyone's theories here, it makes up for not being able to chat about telly in the office!