The Glorious People's Republic of China has issued a ban against time travel.
Apparently the workers should not have to deal with the paradoxes of time travel, such as what happens if you go back in time and kill your grandmother before you mother was born - and why can't Dr Who cross his own time line?
The ban does not apply to boffins who will be allowed to tinker with the God particle and allow China to go backward and forward in time, when ever they work out how to do it.
But when it comes to television shows and movies, time travel is up there with films about Tibet.
According to the New York Times, what it appears the Chinese are worried about is people having a disrespect for Chinese history. The concept of films and telly shows which give the impression that it is possible to go backwards in time and change things is offensive to China's glorious ancestors.
One of the more popular shows is Palace, where a woman gets interested in a Qing dynasty painting, travels back in time and then falls in love with several princes.
The country's State Administration for Radio, Film & Television has stated that producers and writers are treating serious history in a frivolous way, which should by no means be encouraged any more.
The Qing Princes were cool and important ancestors and certainly would not put it about with modern girls, so put on some trousers, Pond.