When the Doctor and Donna visit London's Technology Museum for a glimpse into the future, things don't go to plan.
The most brilliant IT brain in the country can't use her computer. More worrying, the exhibits are attacking the visitors, while outside, people seem to be losing control of the technology that runs their lives.
Is it all down to simple human stupidity, or is something more sinister going on?
Beneath the streets, the Koggnossenti are waiting. For all of London to fall prey to technophobia...
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