These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
I wouldn't call a show sexist just because the women in it do not fight. Additionally most of them (e.g. Gay Ellis and Nina Barry) were seen or implied to have been in a variety of scuffles and definitely in general fighting situations. Quite a few of the female guest stars were fighting one way or the other.
Visual Effects of Awesome: The use of miniatures is obvious, but Gerry Anderson and FX supervisor Derek Meddings really knew how to work with miniatures. Compare the special effects in this series to those in Star Trek: The Original Series (just a couple of years before) or contemporary (or even later) Doctor Who episodes; UFO looks astonishingly good in places.