'Until now, we've only touched the surface', that's what they say anyway. Apparently there's a lot of undiscovered stuff down in the deep blue sea that up until now, mankind just hasn't had the know-how to get a look at. Expect to see stuff that will have you leaping out of your armchair, shouting 'What the bloody hell is that?!' and 'Jesus, that thing looks like a bogey with fairy lights on it!'. One thing which threw me was the total absence of David Attenborough, his replacement is Michael Gambon, but you're sure to come away much wiser for your efforts.