Simply horrendous.
The "investigator"/presenter/moron that guides (I use that word in the loosest term possible) us through the series is unbearable. He will ask someone a question or find out an answer in himself and then just continue repeating the same information over and over again for 5-10 minutes. I'm pretty sure everything in this programme could be found out via Google and all he does is state the blindingly obvious and goes into dead ends. When he talks, he makes everything sound incredibly dramatic, the only reason I can think is that he was so bored himself that he had to do something to make the programme entertaining.