And with that all out of the way Doctor Who screeches up to the very edge of ultra-modernity, almost, but not quite teetering and falling into the future. In many ways it is to 2013 what The War Machines was to 1966: swap those eponymous tanks for the Spoonheads, the Post Office Tower for the Shard, WOTAN for the Great Intelligence... Except of course that any similarity is utterly obscured by the astonishing changes that those forty-seven years have wrought.
This episode is thoroughly au fait with the pervasive and inter-connected nature of modern technology. The lights in your street can bring down a plane; human behaviour can be adjusted with an app; people's most private data (their, er, souls?) can be uploaded to the cloud, or rewritten. Kizlet traces the Doctor not with CCTV, but by flicking in real time through the location-pinned photos that are being uploaded to the web. Clara discovers the enemy HQ by hacking their webcams and cross-referencing the data against social media profiles. There are no ponderous explanations, it all just flashes across our eyes, the screen filling with code and data; none of this seems outlandish, or incredible to us sat at home - we get it, we are already part of the technosphere.
This is why it's not facile or cliched to turn wi-fi into a threat. This isn't the plastic attacking in Terror of the Autons, or the Christmas tree turning on Rose and Jackie. We're being shown the world we live in, and good thing too.
There are some superb moments in The Bells of Saint John. The