Re: Wading in late
The educational focus of the show was more on history, not science.
It was actually about half and half. Go back and watch season 1 of the classic again and you'll see it, particularly in The Daleks (the second story), where they go into pretty good detail about the basics of electricity. Considering that they were working with a 20 minute episode format the amount of time spent on the subject can't be anything less than an intentional lesson for the viewers.