Been watching it on Sky+, so a bit behind.
Such depressing watching. I find the pattern of women-with-terrible-problems hooking up with men-with-even-worse- problems so bloody depressing 
I work in youth offending, so a different end of things and no work with babies or young children (which I don't think I'd have the strength for), but I come across this pattern all the time with parents of the young people I work with - mothers with substance misuse and.or mental health problems who are unable to emotionally extricate themselves from men with even worse problems.
I take my hat off to these SWs. I wouldn't have the patience or the stomach for it.