The level of tension and difficulty in knowing who is the most dangerous is so reminiscent of Line oF Duty. What a brilliant piece of television. I agree with you mcem, adrenalin following a life threatening incident, combine that with two lonely, emotionally all over the place / repressed people and the inevitable happens.
I heard someone on a radio 5 phone in after episode 1, who complained that 'political correctness' led her husband to walk out. she said they both found it unbelievable that so many key characters were female! Ahem, Theresa May, Amber Rudd, Cressida Dick to name three women in key roles right now. Anyone who had worked with the Police for example, will be in regular contact with female officers at all ranks, they are ambitious and do get promoted of course. Sorry, OP rant.