random point - the person upthread who said Mrs Crabb was dead - she isn't, she was in the episode last week. I wonder if they got her confused with Mrs Grove but that actress - happily - is also alive and well, so I'm baffled by what that poster meant.
okay, SPOILERS....will leave a big gap so you can not see them if you don't want to....
look it's a big gap 
okay, things that have pissed me off
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having treated Miss Mardle like shite for years, Grove proposes to her and we're supposed to see it as a happy thing they are getting married!! Good grief, she always deserved better and not only that, she said she didn't want children and now she's saddled with the entire flipping brood, double because he'll be dead!
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Frank and Kitty - bad enough that Kitty even considered having a baby to please him - though I suppose childfree women everywhere should be grateful a show bothered to look at the issue at all (eyeroll). So, would have been much happier if Kitty had just left for New York and put her career above he r marriage, but no, we have to have Frank having a ONS - doesn't do men much credit with the whole "men can't help it" crap - and then she goes because of it, but forgives him at the last minute? Kitty should have been having a whole new life in NY, and divorcing Frank.
it would have been a much better storyline and fairer to Kitty's strength of character, if she just said "my career is vital - I'm going to New York". It all felt like a crappy overthought compromise.
overall the message this season, with Harry's own pathetic streak, is that "single is a terrible option". Very sad. Miss Mardle, Kitty, they could have been happy alone. Harry, I get - they have to base him on the real man - but not the others.
also thought the scene with Jimmy and Victor was well set up, but the execution of the final moment didn't work, which was a pity. There's a great sense of stuff being half baked this season? I could be wrong but I don't think Andrew Davies has written for them at all this season, which may explain why the writing seems so poor in comparison to previous ones.