Unfortunately the sci-docs are few and far between, for my taste. The obvious show that comes to mind is Tomorrows World. And then there are those pioneering programmes using ultra-miniature cameras that get into all kinds of places than the normal human mind would fail to conjure up. Such as the female reproductive system during coital pleasures. It has been done!
Then there are the highly detailed surgical procedures that always seem to display graphic detail just as you sit down to your evening meal.