The good Transformers are once again besieged by the bad transformers and this time the whole of humanity is in peril. Oh hang on, they were in peril in the last two as well. So there you have it, pretty much the same story line; the same laboured humour and the same amazingly created CGI action scenes rendered often un-fathomnable by editing so brutal Genghis Khan would have given it the leadership of his marauding hordes.