When the TARDIS lands on Orkney in the near future, the Doctor and Amy arrive to find a large demonstration in progress over the construction of new electricity pylons. The Doctor tries to break things up peacefully - but suddenly the road splits open without warning and swallows police, security guards, and protestors alike. Separated from the Doctor, Amy takes charge of transporting the wounded to hospital - but the rescue mission becomes a terrifying ride as the pylons come to life and begin to walk and the road rears up, erupting with boiling tarmac...
The Doctor, meanwhile, has even more than metal monsters and rebellious roads to deal with. Who is sucking the life out of the power company's employees - and just what is lurking inside the Astra-Gen headquarters?
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- The Doctor says "You're only young twelve times", a reference to the number of times a Time Lord can regenerate. However, 12 regenerations means 13 incarnations.
- This story is read by Arthur Darvill, though Rory does not appear in it.
- The story was also available as a download from the AudioGO website before the company went into administration.
- The downloadable version cover is incorrect. It states that Matt Smith reads it.
- A free copy of this story was given away with The Observer newspaper on 20 February 2011.
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