Same here. Well, maybe not crap, but certainly not good enough to keep me watching for more than quarter of an hour. I know a lot about Hannibal and a fair bit about cycle touring and this was pretty lightweight on both.
I blame the commissioning editors at the Beeb. Go to them with "I want to do this series on building Hadrian's Wall - great scenery, lots of proper history" and you will get "Nah. Too serious - no-one will watch it. You need Human Interest. Drag in a dozen teenagers, half of them trying to lose weight and the other half looking for jobs, dress them up as legionaries and feed them on Roman food, stick them in tents, bit of sobbing and swearing - that's a proper documentary. You can do the heavy history bit with some hairy boffin from Newcastle University giving it a couple of minutes every now and then."
It's exactly the same with science. The Beeb's core belief is that the audience is so stupid, vacuous and ill-informed that you cannot get across any serious ideas except by having a minor sleb front it, doling ideas out in five minute bursts and mixing it with lots of jokes to give us time to catch up. There is an intellectual arrogance and smugness in the Beeb which is rather depressing.