Look Around You
The first series parodies old schools and colleges shows. All the science is presented in a serious manner but even if it starts sensibly it soon goes off the rails and into the world of the bizarre. It can be slow at times but it's funny, in a strange way, and each episode is very short.
The second series parodies Tomorrow's World. This was a great disappointment to me after the first show. It's just not as good... well not even good. The half hour format was too long and the presenters were annoying. While the first series was bizarrely good this just seemed stupid.