The potential downsides to mucking about with the space-time continuum.
The ten best London apocalypses on film
The big smoke lives up to its name as it faces annihilation in these disaster movies
London has taken a hammering in the movies this summer, besieged by blue-goo aliens in 'The World's End' and bombed to smithereens in 'GI Joe: Retaliation' and 'Star Trek into Darkness'. That's nothing new – over the years movies have hurled their fair share of mayhem at our fragile little city.
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