Why did I forget the starting line-up? Or indeed, the second line-up when Vicki replaced Susan? Because I have had only one cup of tea, I presume. Mea culpa.

I always thought of UNIT as a subtly different set-up, though. Albeit one I'm glad they seem to be getting back to, by having returning allies who are nonetheless not obliged to be there every week and given something to do. Which is what I mean by 'unbalancing', really. The love thing was boring, but is avoidable - however, every companion in an episode is going to have to be given a Moment. And that makes for a bit too much of the episode tied up by the regular cast - whereas before, someone could be absent for one episode because they got to shine somewhere in the other three parts of the story.